Higgins, Peter M.,  1956- <br/><br/>
Techniques of semigroup theory / 
Peter M. Higgins. 
 - Oxford [England] ;  New York :  Oxford University Press,  1991. 
 - x, 258 p. 
<br/><br/><label>ISBN: </label>0198535775  
<br/><br/><label>LCCN: </label>93015154     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Semigroups.