Peterson, Willis L. Principles of economics : macro by Willis L. Peterson. - Homewood, Ill. : R. D. Irwin, 1971. - xi, 257 p. : ill. ; 23 cm. - Irwin series in economics. . LCCN: 72-149900 Subjects--Topical Terms: Macroeconomics. Dewey Class. No.: 339 PET