Introduction to ring theory // 
P.M. Cohn. 
 - London ;:  Springer,  c2000. 
 - x, 229 p. : 
<br/><br/><label>ISBN: </label>1852332069 (pbk. : alk. paper) 
<br/><br/><label>Dewey Class. No.: </label>512.4  / COH/I