Drucker, Peter F. 1909-2005. Managing in turbulent times / by Peter F. Drucker. - New ed. - London : Butter worth Heinemann Ltd. , c1980. - xi, 239 p. ; 22 cm. Includes index. ISBN: 0750617039 LCCN: 79003389 Subjects--Topical Terms: Industrial management. LC Class. No.: HD31 / .D7734 1980 Dewey Class. No.: 658