Loehr, Nicholas A. <br/><br/>
Combinatorics/ 
Nicholas A. Loehr. 
 - 2nd ed. 
 - Boca Raton:  CRC Press,  c2018. 
 - 618 p.:  ill.;  26 cm. 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>978-1-4987-8025-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis.
<br/><br/><label>Dewey Class. No.: </label>GC 511.62 L825 2018