COHN, P.M. <br/><br/>
Free rings and their relations 
/ [by] P.M.Cohn 
 - London  Academic press  1971 
 - xvi, 346 p. 
<br/><br/> Includes bibliography, appendix & index. 
<br/><br/><label>ISBN: </label>121791505 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rings
<br/><br/><label>Dewey Class. No.: </label>512.4  / COH