Vatssa, B.S.. Discrete Mathematics / B.S. Vatssa. - New Delhi : Wishwa Prakashan , 1986. - vii,273p. : ill.,figs. ; 22cm . NULL ISBN: 8173280134 Rs. 50.00 Subjects--Index Terms: COMPUTER SCIENCE-MATHEMATICS Dewey Class. No.: 512.74 / VAT/D