TY  - BOOK
AU  - WALLIS, W.D.
TI  - A BEGINNERS GUIDE TO DISCRETE MATHEMATICS
SN  - 8181282159
U1  - 518/WIL 
PY  - 2004///
CY  - NEW DELHI.
PB  - TATA MCGRAW HILL CO LTD., NEW DELHI.
ER  -