Olympus Optical Co.,Ltd.Milestone

University of Michigan Historical Scientific and Medical Artifacts Collection – Gastroscopes
(Pictures of endoscopes before the development of the gastroscope, and various models of gastroscopes)

University of Michigan Medical Center – Gastrointestinal Endoscopy Home Page
(Pictures taken by gastroscopes)

Image-Guided Navigation System

The Gastrolab Endoscopy Picture Archives (Medscape)

Endoscopy (Susan Srour)

Selected Papers on Optical Fibers in Medicine
Abraham Katzir, Editor Tel Aviv University 732 pages, Published May 1990