TY  - BOOK
AU  - Billington,Elizabeth J.
TI  - Discrete mathematics: logic and structures 
SN  - 0582662745
PY  - 1990///
CY  - Melbourne
PB  - Longman Cheshire
KW  - Computer science
KW  - Mathematics
KW  - Problems, exercises, etc
KW  - Logic, Symbolic and mathematical
ER  -