Genring F.W. Ed. <br/><br/>
Mathematical review./American mathematical society 

 - U.S.A.  American Mathematical society          1967 
<br/><br/> Half yearly 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>Bm73,N50, K7.34