TY  - BOOK
AU  - Wallis W D
AU  - Georgr J C
TI  - Introduction to Combinatorics
SN  - 9781439806227
U1  - 511.6 WAL 
PY  - 2011///
CY  - New York
PB  - CRC Press
KW  - Introduction to Combinatorics
KW  - Wallis W D
ER  -