Ruffin, Roy, 1938-
Principles of economics / Roy J. Ruffin, Paul R. Gregory. - 5th ed. - New York : HarperCollins College Publishers, c1993. - xxxi, 850 p. : ill.
Includes bibliographical references and indexes.
067346590X
Economics.
Principles of economics / Roy J. Ruffin, Paul R. Gregory. - 5th ed. - New York : HarperCollins College Publishers, c1993. - xxxi, 850 p. : ill.
Includes bibliographical references and indexes.
067346590X
Economics.