Precancerous Lesions of the Gastrointestinal Tract. - 330pages "International Symposium on Precancerous Lesions of the Gastronintestinal Tract in October 1981...Bologna Italy...Includes bibliographies and index Includes bibliographies and index. Department of Medicine School of Medicine ISBN: 0890048835 Subjects--Topical Terms: Gastrointestinal system--Cancer--Congresses.Precancerous conditions--Congresses. LC Class. No.: RC 280 .D5 .P742 1983