Copi, Irving M. Introduction to logic / Irving M. Copi and Carl Cohen - 11th ed. - New Delhi : Prentice-Hall of India, c2002. - xxi, 647 p. ; ill. ; 25 cm. ISBN: 812032496x LCCN: Subjects--Topical Terms: LogicTextbooks LC Class. No.: BC108 / .C69 2002