Ruffin, Roy J.
Principles of economics / Roy J. Ruffin, Paul R. Gregory. - 5th ed. - Harper Collins 1993.
3452
Economics.
HB171.5 / Ruf.
Principles of economics / Roy J. Ruffin, Paul R. Gregory. - 5th ed. - Harper Collins 1993.
3452
Economics.
HB171.5 / Ruf.