Zwerdling, Michael. Michael Zwerdling Nursing Postcard Collection. 1893-2002. Located in: Prints and Photographs Collection, History of Medicine Division, National Library of Medicine, Bethesda, MD; PP2004-22.
Zwerdling, Michael. Michael Zwerdling Nursing Postcard Collection. 1893-2002. Located in: Prints and Photographs Collection, History of Medicine Division, National Library of Medicine, Bethesda, MD; PP2004-22. https://findingaids.nlm.nih.gov/repositories/6/resources/898 Accessed May 02, 2024.
