Lallement Gerard <br/><br/>
Semigroups and combinatorial applications 

 - New York  John wiley & sons  1979 
 - xi+376p 
 -  Wiley-Interscience series of texts,monographs and tracts  Bers,Lipman  Hilton,Peter  Hochstadt, Harry .
<br/><br/><label>Universal Decimal Class. No.: </label>519  / LAL.79