197,604 EUROPEAN 4th European Congress of Gastrointestinal Endoscopy. Proceedings of 1st International Symposium on Ranitidine. Hamburg Saturday, 14 June 1980 Ed. by J. Misiewicz, and K.-Fr. Sewing. Oslo 1981 Universitetsforlaget 4 s. nlb. 10, 131, il. Scandinavian Journal of Gastroenterology, suppl. 69 [Tyt. okł.]