Leftwich, Richard H. An introduction to economic thinking / [by] Richard H. Leftwich. - New York : Holt, Rinehart and Winston, [1969]. - xii, 686 p. : illus. (part col.) ; 24 cm. - 330.1 . Includes bibliographies. ISBN: 0030694957 Subjects--Topical Terms: Economics. Dewey Class. No.: 330.1