TY  - BOOK
AU  - Lipschutz, Seymour and Lipson, Marc Lars
TI  - 2000 solved problems in discrete mathematics
SN  - 0-07-038031-7
U1  - 519.4 Lip/Lip 
PY  - 1992///
CY  - Mcgraw-hill, New York
ER  -