Byrns, Ralph T. Great ideas for teaching economics / Ralph T. Byrns and Gerald W. Stone - 4th ed. - London : Scott, Foresman and company, c1989. - 473 p. ; ill. ; 26 cm. ISBN: 0673471225 LCCN: Subjects--Topical Terms: EconomicsStudy and teaching. LC Class. No.: G78b / . 1989 Dewey Class. No.: 330.078