Combs, Arthur W. 1912- Helping relationships : basic concepts for the helping profession s / Arthur W. Combs, Donald L. Avila, William W. Purkey. - Boston : Allyn and Bacon, Inc. , 1971. - vii, 360 p. ; 22 cm. Includes bibliographical references and index. Subjects--Topical Terms: Helping behavior. Dewey Class. No.: 158.3