TY  - GEN
AU  - Lipschutz,Seymour
AU  - Lipson,Marc
TI  - 2000 solved problems in discrete mathematics
SN  - 0070380317
AV  - QA43 
PY  - 1992///
CY  - New York
PB  - McGraw-Hill
N1  - Includes index
ER  -