Drucker, Peter F. 1909-2005. Managing in turbulent times / by Peter F. Drucker. - 1st ed. - New York : Harper & Row, c1980. - viii, 239 p. ; 22 cm. Includes index. ISBN: 0060110945 Subjects--Topical Terms: Industrial management. LC Class. No.: HD31 / .D7734 1980 Dewey Class. No.: 658