Ruffin, Roy 1938- Principles of Macroeconomics / Roy J. Ruffin, Paul R. Gregory. - 3rd ed. - Glenview, Ill. : Scott, Foresman, c1988. - xxxi, 918, [42] p. : ill. (some col.) ; 27 cm.. Includes bibliographies and index. ISBN: 067318871X : $30.00 0673188833 (Marco volume) : $18.00 0673188825 (Micro volume) : $18.00 LCCN: 87023369 Subjects--Topical Terms: Economics. LC Class. No.: HB171.5 / .R831 1988 Dewey Class. No.: 330