TY - BOOK AU - AU - Sherlock, Paul. ED - ED - ED - ED - SN - 890048835 SN - 2 PY - 1983///];copyright 1983.46 CY - New York PB - Raven Press KW - KW - 2 KW - 0 KW - 6 KW - 20 KW - Cancer;Congresses.;Congresses.;Congresses.;Congresses KW - Gastrointestinal system;Precancerous conditions;Gastrointestinal neoplasms;Precancerous conditions N1 - International Symposium on Precancerous Lesions of the Gastrointestinal Tract in October 1981 ... Bologna, Italy--Acknowledgments; Includes bibliographies and index; 5 ER -