Organizational communication : the keystone to managerial effectiveness / Jerry C. Wofford, Edwin A. Gerloff, Robert C. Cummins. Wofford, Jerry C. Gerloff, Edwin A., joint author. Cummins, Robert C., joint author. Communication in management. Communication in organizations. 658 WOO Includes bibliographies and indexes. New York : McGraw-Hill, c1977. c1977. 1977 Text xiv, 477 p. : eng McGraw-Hill series in management