Prather, Ronald E. Elements of discrete mathematics / Ronald E. Prather ; [illustrations by Jean-Paul Marchand]. - Boston : Houghton Mifflin, c1986. - xiv, 538 p. : ill. ; 25 cm. Includes index. ISBN: 0395351650 Subjects--Topical Terms: Mathematics. Dewey Class. No.: 511.1 / PRE 1986