SEIFERT ERWIN /red./ 535,469 GASTROINTESTINAL Gastrointestinal endoscopy. Reviews of the IV European Congress E. S. G. E. Hamburg, June 13-14, 1980. Ed. by Meinhard Classen, Harald Henning and Erwin Seifert. With contributions by G. Clemencon (et al.). Stuttgart 1980 8° s. nlb. 6, 94, il. Endoscopy, suppl.