Berman, Gerald. <br/><br/>
Introduction to combinatorics / 
Gerald Berman and K.D. Fryer. 
 - New York :  Academic Press,  1972. 
 - xiii, 300 p. : 
<br/><br/><label>ISBN: </label>0120927500 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis.
<br/><br/><label>Dewey Class. No.: </label>511.6  / In