TY  - BOOK
AU  - Andreescu,Titu
AU  - Feng,Zuming
TI  - A path to combinatorics for undergraduates: counting strategies 
SN  - 0817642889 (alk. paper)
PY  - 2004///
CY  - Boston
PB  - Birkhauser
KW  - Combinatorial analysis
KW  - Combinatorial number theory
N1  - Includes bibliographical references (p. 221-225) and index
ER  -