Winter Aurel <br/><br/>
Arithmetical semi-groups 

 -  1944 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>64374 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic
<br/><br/><label>Dewey Class. No.: </label>B131:2:3, H4