TY  - BOOK
AU  - Brualdi, Richard A.
TI  - Introductory Combinatorics 
SN  - 9788131718827
U1  - 511.6 BRU 
PY  - 2009///
CY  - New Delhi
PB  - Pearson
KW  - Mathematics
KW  - , Combinatorics
KW  - , Permutations
ER  -