Cohn, P. M. <br/><br/>
Free rings and their relations / 
Cohn, P. M. 
 - 1a. ed. 
 - London & New York :  Academic Press,  c1971 
 - xvi, 346 p. :   il. ;   23 cm. 
 - London Mathematical Society Monographs ;  no. 2 .
<br/><br/>Bibliografía : Incluye índice 
<br/><br/><label>ISBN: </label>0121791505 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Anillos asociativos 
<br/><br/><label>LC Class. No.: </label>QA251.5  / C64 1971