Improving interpersonal relations : a guide to social skill development for managers and group leaders / Cary L. Cooper. Cooper, Cary L. Social skills Study and teaching. Middle managers Training of. Group relations training. HF5549.5.G73 I45 1982 658.4 19 COI "A Spectrum book." Includes bibliographies and index. Englewood Cliffs, N.J. : Prentice-Hall, c1982. c1982. 1982 Text viii, 147 p. : eng