Grimaldi, Ralph P. Discrete and combinatorial mathematics : an applied introduction / Ralph P. Grimaldi. - 4th ed. - New Delhi : Pearson Education, c1999. - xix, 791, [138] p. : ill. ; 24 cm. Includes index. ISBN: 0201199122 Subjects--Topical Terms: MathematicsComputer science --Mathematics. LC Class. No.: QA39.2 / .G75 1999