Lipsey, Richard G. An introduction to positive economics / Richard G. Lipsey and K. Alec Chrystal - 8th ed. - Oxford : Oxford University Press, c1995. - xxii, 919 p. : ill. ; 24 cm. ISBN: 019442545 LCCN: Subjects--Topical Terms: Economics LC Class. No.: HB171 / .L715 1995 Dewey Class. No.: 330.1 / L767i