TY  - BOOK
AU  -  Hillman,Abraham P  .
TI  - Discrete and combinatorial mathematics / 
SN  - 0023545801
U1  - 511.6 
PY  - 1987///
CY  - California : 
PB  - Dellen Publishing , 
KW  - COMBINATORIAL ANALYSIS
N1  - Includes bibliography and index
ER  -