[20 years of gastroenterological endoscopy. 1967-1987].
D004724:Endoscopy / Q000266:history*; D005762:Gastroenterology / Q000266:history*; D005860:Germany, West; D049673:History, 20th Century; D006801:Humans; D012955:Societies, Medical / Q000266:history*
20 Jahre gastroenterologische Endoskopie. 1967-1987.