31. The influence of anæsthesia on the surgery of the nineteenth century: address of the president Author(s): Warren, John Collins, 1842-1927 author Publication: [Philadelphia] : [publisher not identified], [1897?] Subject(s): Anesthesia -- historyAnesthetics -- historyGeneral Surgery -- historyHistory, 18th CenturyHistory, 19th Century
32. History of surgery: introductory lecture to the forty-eighth session of the Hahnemann Medical College, Philadelphia, September 30, 1895 Author(s): Van Lennep, William B. (William Bird), 1853-1919 Publication: [Philadelphia?] : [publisher not identified], [1895?] Subject(s): General Surgery -- history