Benjamin L. Ryder letter to George H. Taylor, MSS 2/259, Folder: 1. Historical Medical Library of The College of Physicians of Philadelphia.
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Benjamin L. Ryder letter to George H. Taylor, MSS 2/259, Folder: 1. Historical Medical Library of The College of Physicians of Philadelphia. http://localhost:8081/repositories/2/resources/952 Accessed July 23, 2026.