Lemmon, E. J. Beginning logic / E. J. Lemmon. - Indianapolis : Hackett Pub. Co., c1978. - x, 225 p. ; 22 cm. Includes index. ISBN: 0915144506 LCCN: 78051926 Subjects--Topical Terms: Propositional calculus.Predicate calculus. LC Class. No.: QA9.3 / .L45 Dewey Class. No.: 511/.3