TY  - BOOK
AU  - Brualdi,Richard A.
TI  - Introductory combinatorics
SN  - 9780136020400   
U1  - 511.6 B83I5 
PY  - 2009///
CY  - New Jersey
PB  - Pearson Education, 
KW  - Graph theory
KW  - Digraphs and networks
KW  - Bionominal coefficient
KW  - Pigeonhole principle
ER  -