Pollak G. Ed. <br/><br/>
Proceeding on Algebraic theory of semigroups 
Pollak G. Ed. 
 - Amsterdam  North-Holland           1976 
 - 753p.  cm. 
 - Colloquia mathematics societies janos bolyai; 20 .
<br/><br/><label>Standard No.: </label>460 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B27p1,N76, L6