1. Doctors making speeches;Orr;Am Surg,1951
2. Dr. John S. Bobbs; the father of cholecystostomy;Brayton;Indiana Med J,1905
3. An Introduction to the History of Medicine;Garrison,1924
4. Carl Langenbuch: ‘Master surgeon of the biliary system’;Halpert;Arch Surg,1932
5. 100th Anniversary of the first Cholecystectomy; a reprint of the 50th Anniversary Article from the Archives of Surgery, July 1932;Sparkman;Arch Surg,1982