Elton, Edwin J. Modern portfolio theory and investment analysis / Edwin J. Elton, Martin J. Gruber. - 2nd ed. - New York : Wiley, c1984. - xviii, 636 p. : ill. ; 24 cm. Includes bibliographies and index. ISBN: 0471874825 Subjects--Topical Terms: Portfolio management.Investment analysis. Dewey Class. No.: 332.6 / ELM 1984