536,847 ABSTRACTS Abstracts of the XI International Congress of Gastroenterology - A. S. N. E. M. G. E. - Hamburg, June 8-13, 1980. President Ludwig Demling. Stuttgart 1980 Georg Thieme Verlag 8° s. nlb. 6, XI, 394, nlb. 24. Hepato-Gastroenterology. Journal for Clinical Research and Practice. Suppl. /Tekst część, w jęz. fr. i niem./