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Twentieth-Century America. University of California Press. pp. 52–54. ISBN 978-0-520-24749-9 Altenbaugh, Richard J. (2018). Vaccination in America: Medical Science...5 KB (466 words) - 14:04, 5 December 2023
Twentieth-Century America. University of California Press. pp. 52–54. ISBN 978-0-520-24749-9 Altenbaugh, Richard J. (2018). Vaccination in America: Medical Science...110 KB (11,109 words) - 15:14, 18 June 2024
