TY  - BOOK
AU  - Chetwynd, A. and Diggle, P.
TI  - Discrete mathematics
SN  - 0340610476.
AV  - QA39.2.C4 1995. 
PY  - 1995///
CY  - London.
PB  - Arnold.
KW  - Combinatorial anaiysis
KW  - Electronic data procssing- mathematics
ER  -