Billings, John S. John S. Billings correspondence in the New York Public Library. 1866-1913. Located in: Modern Manuscripts Collection, History of Medicine Division, National Library of Medicine, Bethesda, MD; MS C 276.
Billings, John S. John S. Billings correspondence in the New York Public Library. 1866-1913. Located in: Modern Manuscripts Collection, History of Medicine Division, National Library of Medicine, Bethesda, MD; MS C 276. https://findingaids.nlm.nih.gov/repositories/4/resources/501 Accessed March 28, 2024.