TY  - BOOK
AU  - Hilliman Abraham P.
AU  -  Alexanderson Gerald L.
AU  -  Grassl Richard M.
TI  - Discrete and combinatorial mathematics
U1  - B, M7 
PY  - 1987///
CY  - London
PB  - C ollier Macmillan pub      
KW  -  Combinatorial Analysis
KW  - Electronic Data Processing-Mathematics
ER  -