Principles of economics /
Ruffin, Roy, 1938-
Principles of economics / Roy J. Ruffin, Paul R. Gregory. - 4th ed. - Glenview, Ill. : Scott, Foresman/Little, Brown Higher Education, c1990. - xxxii, 851 p. : ill. ; 26 cm.
Includes bibliographical references and indexes.
0673460207
Economics.
HB171.5 / .R82 1990
330
Principles of economics / Roy J. Ruffin, Paul R. Gregory. - 4th ed. - Glenview, Ill. : Scott, Foresman/Little, Brown Higher Education, c1990. - xxxii, 851 p. : ill. ; 26 cm.
Includes bibliographical references and indexes.
0673460207
Economics.
HB171.5 / .R82 1990
330