Hagstrom Robert G. , Warren Buffett portfolio: mastering the power of the focus investment strategy by Robert G. Hagstrom - - New York: John Wiley & Sons, 2000. - 220 p.: ill.; 23 cm. - - . Includes bibliographical references and index ISBN: 9780471392644 = Nat. Bib. No.: Nat. Bib. Agency Control No.: Subjects--Meeting Names: Subjects--Index Terms: Financial economics Investments Portfolio management LC Class. No.: / Dewey Class. No.: 332.6 HAG