Polio - Salk Vaccine ["The virus scare" by Gerald Markowitz]

Polio - Salk Vaccine ["The virus scare" by Gerald Markowitz], Box: 9, Folder: 43. Personal Papers of Lloyd Sponholtz, PP 521. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/252522 Accessed December 24, 2025.