Chatterjee, Sipak <br/><br/>
Aabstrract algebra 

 - New Delhi  Prentice-hall of India  2005 
 - 364p. 
<br/><br/><label>ISBN: </label>81-203-2870-1 
<br/><br/><label>Dewey Class. No.: </label>512      Cha.P5