Cotton, Peter B. <br/><br/>
Practical gastrointestinal endoscopy / 
Peter B. Cotton and Christopher B. Williams. 
 - 4th ed. 
 - Oxford :  Blackwell Science,  1996. 
 - xi, 338 p. :  ill. ;  26 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0865428514 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Endoscopy.<br/>Gastrointestinal diseases-diagnosis.