Colberg, M. R., 1913-2000. Business economics : principles and cases / Marshall R. Colberg, Dascomb R. Forbush ; assisted by the contribution to previous editions of Gilbert R. Whitaker, Jr. - 7th ed. - Homewood, Ill. : Irwin, 1986. - xii, 539 p. : ill. ; 25 cm. Includes bibliographical references and indexes. ISBN: 0256033412 LCCN: 85082617 Subjects--Topical Terms: Managerial economics. LC Class. No.: HD30.22 / .C67 1986 Dewey Class. No.: 658