John Heysham Gibbon papers, MSS 2/204, Box: 1; Box: 2. Historical Medical Library of The College of Physicians of Philadelphia.
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John Heysham Gibbon papers, MSS 2/204, Box: 1; Box: 2. Historical Medical Library of The College of Physicians of Philadelphia. http://localhost:8081/repositories/2/resources/112 Accessed July 23, 2026.