Diseases of the gastro-intestinal tract  :  some diagnostic, therapeutic and fundamentals aspects / 
Edited by W. R. O. Goslings 
 - Leiden :  Leiden University Press,  1969 
 - 126 p. :  ill. ;  23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gastroenterology--Congresses