TY  - BOOK
AU  - Levy,Leon S.
TI  - Discrete structures of computer science
SN  - 0471081434
U1  - QA/248 
PY  - 1980///
CY  - New York
PB  - John Wiley
KW  - Algebra.
KW  - Electronic digital computers -- Programming.
KW  - Functions.
KW  - Graph theory
KW  - Set theory.
ER  -