Clayton, Gary E. Economics : principles and practices / Gary E. Clayton - New York : Glencoe : McGraw-Hill, 1995 - xiv, 626 p. : ill. col. ; 29 cm. Includes index ISBN: 0028230485 Subjects--Topical Terms: Economía --Estudio y enseñanza (Secundaria) LC Class. No.: HB 171.5 / C53 1995