00454pamaa2200169 4500 0000012645 20060628090000.0 0947190759 510.76 MAS 1995 QA37.2 MAS 1995 MASON Discrete mathematics O.M. Mason and P.T. Trend. 2nd ed. Perth: Batavia Press, 1995. 370p.: 24cm. Mathematics -- Problems, exercises, etc Trend, P.T