00429nam a2200157 a 4500001001400000003000400014008004100018020001500059050002500074100001900099245005000118260003900168300001700207650001500224700003200239vtls000000476MTX930312c1983    enga          001 0 eng d  a067315856x00aHB171.5bR82 P6 19831 aRuffin, Roy J.10aPrinciples of macroeconomics /cRoy J. Ruffin  aIllinois :bScott, Foresman,c1983  a416 p :bill 4aEconomics.1 aGregory, Paul R,cjt. auth.