TY  - BOOK
AU  - Lovasz, Laszlo.
TI  - Combinatorial problems and exercises
SN  - 9780821887080
U1  - 511.6076 
PY  - 2007///
CY  - USA: 
PB  - AMS Chelsea Publishing, 
KW  - Enumeration
KW  - Graphs
KW  - Math
KW  - Permutations
ER  -