History of the instruments for gastrointestinal endoscopy.
Edmonson
J M
JM
Cleveland Medical Library Association, Ohio 44106.
D016099:Endoscopy, Gastrointestinal / Q000266:history*; D004867:Equipment Design; D005060:Europe; D049672:History, 19th Century; D049673:History, 20th Century; D014481:United States