Fogelin, Robert J. Understanding arguments : an introduction to informal logic / Robert J. Fogelin. - 2nd ed. - New York : Harcourt Brace Jovanovich, c1982. - x, 430 p. : ill. ; 24 cm. Includes index. ISBN: 0155928589 (pbk.) Subjects--Topical Terms: Logic. Dewey Class. No.: 160 / FOU 1982