Lemmon, E. J. Beginning logic / [electronic resource] / E. J. Lemmon.. — Indianapolis : : Hackett Pub. Co.,, c1978.. — x, 225 p. ; 22 cm. Includes index. ISBN: 0915144506 LCCN: 78051926 //r88 Subjects--Topical Terms: Propositional calculus.Predicate calculus. LC Class. No.: QA9.3 / .L45 Dewey Class. No.: 511/.3