Hagstrom, Robert G., 1956- The Warren Buffett portfolio : mastering the power of the focus investment strategy / Robert G. Hagstrom. - New York ; Chichester : John Wiley & Sons, 1999 - x,246p. 24 cm. Includes bibliographical references and index. ISBN: 0471247669 Subjects--Personal Names: Buffett, Warren. Subjects--Topical Terms: Investments--United States. Subjects--Index Terms: Đầu tư Mỹ Dewey Class. No.: 332.60973