Copi, Irving M. Symbolic logic / Irving M. Copi - 5th edition. - New York, Macmillan, c1979. - xiii, 398 p. ; 24 cm. GratisBapu Trust ISBN: 9780029787403 (pbk.) Subjects--Topical Terms: Logic, Symbolic and mathematical. Dewey Class. No.: 511.3 COP