TY  - BOOK
AU  - Polya George
AU  -  Beckenbach E F Ed.
AU  -  Riordan John
TI  - Applied combinatorial mathematics
T2  - University of california engineering and physical sciences extension series
U1  - B217, K41 
PY  - 1964///
CY  - New York    
PB  -  John wiley       
KW  - Combinatorial maths
ER  -