References

Case, James Thomas, (1889). John Harvey Kellogg, and Race Betterment Foundation. Good Health. [Battle Creek, Mich.: Good Health Pub. Co.]. Vol 24, No 1. https://babel.hathitrust.org/cgi/pt?id=mdp.39015076976227&view=1up&seq=10

Colgrove, James Keith. (2006). State of Immunity: the Politics of Vaccination in Twentieth-Century America. Berkeley: University of California Press; New York: Milbank Memorial Fund. https://archive.org/details/stateofimmunityp0000colg/page/264/mode/2up?q=oswald

“Good Health (Kellog) Journal Collection.” Adventist Digital Library, adventistdigitallibrary.org/islandora/search?type=dismax&f%5B0%5D=mods_originInfo_publisher_ms%3AGood%5C%20Health%5C%20Publishing%5C%20Company. Accessed 31 Mar. 2024.

McFadden, Bernarr. “Physical Culture – Magazine.” U of Pennsylvania Library, onlinebooks.library.upenn.edu/webbin/serial?id=physicalculture. Accessed 1 Apr. 2024.

Morgulis, Sergius. (1923). Fasting and Undernutrition. New York: E.P. Dutton & Company.  https://collections.nlm.nih.gov/catalog/nlm:nlmuid-35420790R-bk

R.R. Bowker Company, et al. (1873). Obituary Notices. The Publishers Weekly. New York: F. Leypoldt, Oct. 6. 1906 [No 1810]: page 985. https://babel.hathitrust.org/cgi/pt?id=hvd.32044093010726&view=1up&seq=47

Smith, Harold. (1999). American Travellers Abroad: a Bibliography of Accounts Published Before 1900. Lanham, Md.: Scarecrow Press. Pg 223. https://archive.org/details/americantravelle0000smit/page/268/mode/2up?q=Felix+Oswald

Pizzorno, Joseph E; Murray, Michael T. (2013). Textbook of Natural Medicine. Elsevier Health Sciences. https://archive.org/details/textbookofnatura0002unse_03ed/page/n7/mode/2up?q=oswald

Science, New Series, Vol. 24, No. 614 (Oct. 5, 1906), pp. 446-448 (3 pages) https://www.jstor.org/stable/1633076?seq=2

Blue-grass Blade. March 21, 1909, Page 2, Image 2. Article on Dr. Felix Oswald. https://chroniclingamerica.loc.gov/lccn/sn86069867/1909-03-21/ed-1/seq-2/