Clifford A H <br/><br/>
Algebraic theory of semigroups 

 -  1961 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>20221 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B272:2, K1.1