TY  - GEN
AU  - Wallis, W. D
AU  - George, J. C
TI  - Introduction to combinatorics
T2  - Discrete Mathematics and Its Applications
SN  - 9781439806227
U1  - 511 
PY  - 2011///
CY  - Boca Raton
PB  - CRC Press
KW  - COMBINATORIAL ANALYSIS
KW  - MATHEMATICS
ER  -