Acker, David D. Skill in communication a vital element in effective management David D. Acker. - Fort Belvoir, Va. Defense Management Systems College [1990] - xii, 128 p. ill. 23 cm. Shipping list no.: 90-556-P. "April 1990"--P. iv. Includes bibliographical references. ISBN: 4.50 Source: 008-020-01218-1 GPO LCCN: gp 90020297 Subjects--Topical Terms: Communication in management--United States. GPO Item No.: 306 Gov. Doc. Class. No.: D 1.2:C 73/5/990