Google Books:

• Chesnutt, Charles. "Superstitions and Folk-lore in the South," Modern Culture (1901)
• Gilman, Charlotte Perkins. The Living of Charlotte Perkins Gilman: An Autobiography (1935)
• Hedge, Frederic Henry. “Characteristic of Genius” Atlantic Monthly, Vol. 21 (1868)
• Lewis, Orlando. “American Tramp.” The Atlantic Monthly, Vol. 101 (1908)
• Mahoney, John Joseph and Charles M. Herlihy. First Steps in Americanization: A Handbook for Teachers (1918)
• “Newspapers Representations of China and Chinese Americans,” The Outlook (1905)

HathiTrust

• Gilman, Charlotte Perkins. Forerunner (1909-1916)
• Hale, Edwin M. The Practice of Medicine (1894)
• Ladies' Home Journal and Practical Housekeeper, Vol. 5-6 (1887-9)

Internet Archive:

• Articles of War, Military Laws, and Rules and Regulations for the Army of the United States (Revised 1817)
• Beard, George Miller. American Nervousness (1881)
• --. A Practical Treatise on Nervous Exhaustion (1880)
• Bell, Ernest Albert. Fighting the Traffic in Young Girls; or, War on the White Slave Trade (c1910)
• Bellamy, Edward. Looking Backward, 2000-1897 (1897)
• Bradford, Sarah Elizabeth Hopkins. Harriet, the Moses of Her People (1886)
• Bruce, H. Addington. Sleep and Sleeplessness (c1915)
• Bruce, Philip Alexander. The Plantation Negro as a Freeman; Observations on His Character, Condition, and Prospects in Virginia (1889)
• Call, Annie Payson. Power Through Repose (1900)
• Cartwright, Samuel Adolphus. “Report on the Diseases and Physical Peculiarities of the Negro Race,” The New Orleans Medical and Surgical Journal (1851)
• Chesnutt, Charles Waddell. The Colonel’s Dream (1905)
• --. The House Behind the Cedars (1900)
• --. The Marrow of Tradition (1901)
• Clarke, John Michell. Hysteria and Neurasthenia (1905)
• Cleaves, Margaret Abigail. The Autobiography of a Neurasthene: As Told by One of Them (1910)
• De Manacéïne, Marie. Sleep: Its Physiology Pathology Hygiene and Psychology (1897)
• Dixon, Thomas. The Leopard's Spots; A Romance of the White Man's Burden--1865-1900 (1903)
• Douglass, Frederick. My Bondage and My Freedom (1855)
• --. Narrative of the Life of Frederick Douglass, an American Slave (1845)
• Du Bois, W.E.B. (William Edward Burghardt). The Souls of Black Folk, Essays and Sketches (1903)
• Edholm, Charlton. Traffic in Girls and Work of Rescue Missions (1899)
• Elam, Charles. A Physician’s Problems (1869)
• Franklin, Benjamin. Poor Richard's Almanac (1732)
• Gilman, Charlotte Perkins. “A Suggestion on the Negro Problem,” American Journal of Sociology (1908)
• --. Moving the Mountain (1911)
• --. The Crux (1911)
• --. The Home, Its Work and Influence (1904)
• --. “The Yellow Wall Paper” (1892)
• --. What Diantha Did (1910)
• Grant, Madison. The Passing Of The Great Race (1916)
• Hall, Bolton. The Psychology Of Sleep (1916)
• Hopkins, Pauline E. Of One Blood, or The Hidden Self (1903)
• Jacobs, Harriet Ann. Incidents in the Life of a Slave Girl (1861)
• James, William. On Vital Reserves: The Energies of Men. The Gospel of Relaxation (1911)
• Jefferson, Thomas. Notes on the State of Virginia (1785)
• Melville, Herman. The Piazza Tales (1856)
• Mitchell, Silas Weir. Fat and Blood: and How to Make Them (1877)
• Northup, Solomon. Twelve Years a Slave (1855)
• Perrault, Charles. The Sleeping Beauty in the Wood (1697)
• Preston, George J. Hysteria and Certain Allied Conditions (1897)
• Reade, Arthur. Tea and Tea Drinking (1884)
• Shakespeare, William. Shakespeare’s Comedy of The Tempest (1610-11)
• Smith, A. Twilight Sleep in America: The Truth about Painless Childbirth (1915)
• Taylor, Frederick Winslow. The Principles of Scientific Management (1911)
• The National Druggist (1884) 
• Tourgée, Albion Winegar. A Fool's Errand (1879)
• Veblen, Thorstein. The Theory of the Leisure Class (1899)
• Washington, Booker T. Character Building (1902)
• --. The Future of the American Negro (1899)
• --. The Negro in the South (1907)
• --. Up from Slavery (1901)
• Wells, H. G., The Sleeper Awakes (1899)
• Wharton, Edith and Ogden Codman. The Decoration of Houses (1897)

JSTOR

• Haynes, Elizabeth Ross. “Negroes in Domestic Service in the United States,” The Journal of Negro History, Vol. 8, No. 4 (Oct., 1923), pp. 384-442 (DOI: https://doi.org/10.2307/2713693)

Project Gutenberg

• Gilman, Charlotte Perkins. Suffrage Songs and Verses (1911)

TimesMachine (New York Times)

• “Edison's Electric Light. ‘The Times’ Building Illuminated by Electricity” (1882)
• “The Advantages of a Sea Voyage” (1889)
• “Twilight Sleep” (1915)

WikiSource

• Chekhov, Anton. “The Cook's Wedding” (1922)
• Clouston, Thomas Smith. “Female Education from a Medical Point of View,” Popular Science Monthly, Vol. 24 (1884)
• Ellis, Henry Havelock. “The Stuff That Dreams are Made of,” Popular Science Monthly, Vol. 54 (1899)
• --. “The Symbolism of Dreams,” Popular Science Monthly, Vol. 77 (1910)
• Granville, J Mortimer. “Worry,” Popular Science Monthly, Vol. 20 (1881)
• Richardson, Benjamin Ward. “Chloral and Other Narcotics,” Popular Science Monthly, Vol. 15 (1879)
• --. “The Physiology of Sleep,” Popular Science Monthly, Vol. 1 (1872)

__________

Key Terms (Wiki):

• Americanitis 
• Anxiety Disorder
• Apollo 
• Black Codes
• Brownie (camera) 
• Chloral Hydrate
• Circadian Rhythm 
• Colored People's Time
• Degeneration Theory
• Fag
• Flâneur
• Electrical engineering (19th century)
• Endymion (Mythology)
• George Miller Beard
• Hereditary Genius
• Hull House
• Hypnagogia
• Hysteria
• Indefatigable
• Inexhaustible
• Insomnia
• Jupiter Tonans
• Keeping up with the Joneses 
• Kinesis
• Lethargy
• Litter (Vehicle)
• Lotus-Eaters
• Mann Act 
• Margaret Cleaves
• Mephistopheles 
• Mickey Finn (drugs)
• Midsommar (film)
• Neurasthenia
• Nightmare
• Night Terror
• Ocean Liner [19th century]
• Of One Blood (novel)
• Parasomnia
• Phantasmagoria 
• Pseudoscience
• Pullman Porter 
• Racial Hygiene 
• Restless
• Scientific Racism
• Silas Weir Mitchell (physician) 
• Sleep [Children]
• Sleep cycle
• Sleep debt
• Sleep disorder
• Sleep paralysis
• Sleeping Beauty
• Sleeping car
• "Sleepy" (short story) 
• Somnambulism
• Standard Time
• Stasis
• The Awakening (Chopin novel)
• The Interpretation of Dreams
• The Theory of the Leisure Class
• "The Vision of Don Roderick"
• "The Yellow Wallpaper"
• Thomas Edison
• Twilight Sleep
• Vagrancy
• Vanity Fair (novel)
• Wakefulness
• Wandering Jew
• War of the Currents
• Weariness
• White slavery
• William Scott (The Sleeping Sentinel) 

__________

21st-Century Sleep Studies:

• Bernert, RA, CL Turvey, Y Conwell, and TE Joiner. "Association of Poor Subjective Sleep Quality With Risk for Death by Suicide During a 10-Year Period," JAMA Psychiatry, Vol.71, No.10 (2014); DOI:10.1001/jamapsychiatry.2014.1126
• Byun,Jung-Ick et al. "Treatment of Propriospinal Myoclonus at Sleep Onset." Journal of Clinical Neurology, Vol.13, No.3 (2017)
• De la Iglesia, Horacio et al. "Access to Electric Light Is Associated with Shorter Sleep Duration in a Traditionally Hunter-Gatherer Community," Journal of Biological Rhythms, Vol.30, No.4 (2015)
• Denis, D. and G.L. Poerio. "Terror and bliss? Commonalities and distinctions between sleep paralysis, lucid dreaming, and their associations with waking life experiences." J Sleep Res, Vol.26 (2017)
• Domhoff, G. W. "Moving Dream Theory Beyond Freud and Jung." Paper presented to the symposium "Beyond Freud and Jung?"  (2000). 
• Gathercole, Michael. "The Use of Hypnosis for the Treatment of Hypnagogic Hallucinations," Australian Journal of Clinical and Experimental Hypnosis, Vol.36 No.2 (2008), p. 169-75
• Goel, N., H. Rao, J. S. Durmer and D. F. Dinges. "Neurocognitive Consequences of Sleep Deprivation." Seminars in Neurology, Vol.29, No.4 (2009); DOI: 10.1055/s-0029-1237117
• Hower, Isabella M et al. “Circadian Rhythms, Exercise, and Cardiovascular Health.” Journal of Circadian Rhythms, Vol.16 (2018)
• Institute of Medicine (US) Committee on Sleep Medicine and Research. "Extent and Health Consequences of Chronic Sleep Loss and Sleep Disorders." Sleep Disorders and Sleep Deprivation: An Unmet Public Health Problem, edited by Colten HR and Altevogt BM (2006)
• Kamphuis, J, P. Meerlo, J. M. Koolhaas and M. Lancel. "Poor sleep as a potential causal factor in aggression and violence." Sleep Med, Vol.13, No.4 (2012)
• Motomura, Y., Kitamura, S., Oba, K. et al. "Sleepiness induced by sleep-debt enhanced amygdala activity for subliminal signals of fear." BMC Neurosci, Vol.15, No.97 (2014)
• Richter, David, Michael D Krämer, Nicole K Y Tang, Hawley E Montgomery-Downs, and Sakari Lemola, "Long-term effects of pregnancy and childbirth on sleep satisfaction and duration of first-time and experienced mothers and fathers," Sleep, Vol.42, No.4 (2019)
• Saddichha S. "Diagnosis and Treatment of Chronic Insomnia." Annals of Indian Academy of Neurology, Vol.13 (2010); DOI: 10.4103/0972-2327.64628
• Sehgal, A. and E. Mignot. "Genetics of sleep and sleep disorders." Cell, Vol.146, No.2 (2011).
• Sundelin, Tina, Mats Lekander, Göran Kecklund, Eus J. W. Van Someren, Andreas Olsson, and John Axelsson. "Cues of Fatigue: Effects of Sleep Deprivation on Facial Appearance," Sleep, Vol.36, No.9 (2013)
• Valdas, Noreika, Andrés Canales-Johnson, Justin Koh, Mae Taylor, Irving Massey, and Tristan A. Bekinschtein. "Intrusions of a drowsy mind: neural markers of phenomenological unpredictability," Frontiers in Psychology, Vol.6 (2015)
• Van Dongen, H.P., N.L. Rogers and D.F. Dinges. "Sleep Debt: Theoretical and Empirical Issues." Sleep and Biological Rhythms, Vol.1 (2003)
• Wells, Mary Ellen and Bradley V. Vaughn. "Poor sleep challenging the health of a Nation." Neurodiagn J, Vol.52, No.3 (2012)