Lallement, Gerard. <br/><br/>
Semigroups and combinatorial applications   
by Gerard Lallment 
 - New York  John Wiley & Sons  1979 
 - xi, 376p. 
 - Pure and Applied Mathematics .
<br/><br/> A Wiley-Interscience Publications 
<br/><br/><label>ISBN: </label>0471043796 
<br/><br/><label>Dewey Class. No.: </label>512.2  / N79