Mathematical reviews (84a,84b,84c) 

 - USA  Amercian Mathematical Society          1984 
 - x,1260p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Bm.73.N84, M4(84a,84b,84c)