TY  - GEN
AU  - Lipschutz, Seymour
AU  - Lipson, Marc Lars
TI  - 2000 solved problems in discrete mathematics
SN  - 0070473765
U1  - 511.2 
PY  - 2002///
CY  - New Delhi
PB  - Tara McGraw - Hill
KW  - Mathematical systems
ER  -