Elton, Edwin J. Modern portfolio theory and investment analysis / Edwin J. Elton and Martin J. Gruber - 4th ed. - Singapore : John Wiley, c1991. - xvi,736 p. : ill., figs., tabs. ; 22 cm. - Wiley series in finance . Includes index. ISBN: 9971511436 LCCN: Subjects--Topical Terms: Investment analysisPortfolio management LC Class. No.: HG4529.5 / .E47 1991 Dewey Class. No.: 332.6 / E51m