Koontz, Harold. Essentials of management / Harold Koontz, Heinz Weihrich. - 5th ed / . - New York : McGraw-Hill , 1990. - xxv,530p. : ill. ; 23cm . - McGrawHill series in management, ; . - McGrawHill series in management, ; . NULL ISBN: 007035605X NULL Subjects--Index Terms: MANAGEMENT Dewey Class. No.: 658 / KOO/E