Clifford A H <br/><br/>
Algebraic theory of semigroups 
Clifford A H; Preston G B 
 - 2nd 
 -  1964 
 - p.  cm. 
 - mathematical surveys .
<br/><br/><label>Standard No.: </label>40532 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial Theory
<br/><br/><label>Dewey Class. No.: </label>B217, K4;2