TY  - BOOK
AU  - Liu, C.L.
TI  - Introduction to combinatorial mathematics
SN  - 0070381240
U1  - 512.15 
PY  - 0000///McGraw-Hill Book Company
CY  - New York
PB  - 1968
KW  - 31.12 combinatorics
KW  - Analyse combinatoire
ER  -