MYRVOLD H.E. [red.] 546,593 The twentieth Scandinavian Conference of Gastroenterology and the eleventh Scandinavian Meeting on gastrointestinal endoscopy Trondheim, Norway 10-13 June 1987 / ed. by H.L.Waldum, H.E.Myrvold and H. Petersen. - [Oslo] : Norwegian Univ. Press, 1987. - 59 s. ; 25 cm (Scandinavian Journal of Gastroenterology, ISSN 0085-5928 ; vol. 22, suppl. 135)