Gregory, Paul A. Essentials of economics / Paul A. Gregory - 3rd ed. - New York, NY : Harper Collins College Publishers, 1996. - xx, 426 p. : ill. ; 28 cm. ISBN: 0673995704 (pbk.) 50.00 LCCN: 85014636 Subjects--Topical Terms: Economics LC Class. No.: HB171.5 / .G825 1996 Dewey Class. No.: 330