TY  - BOOK
AU  - Wilf,H.S
TI  - Combinatorial algorithms: an update
T2  - CBMS-NSF regional conference series in applied mathematic 55
SN  - 0-89871-231-9
U1  - 511.6 
PY  - 1989///
CY  - Philadelphia
PB  - SIAM
ER  -