Feigelstock, S <br/><br/>
Additive groups of rings  vol. II 
S. Feigelstock 
 - New York  Longman Scientific & Technical  1988 
 - 100 p  25cm 
 - Pitman research notes in mathematics series  169 .
<br/><br/> Cuprinde bibliografie 
<br/><br/><label>ISBN: </label>0582013704