Combs, Arthur W. 1912- Helping relationships : basic concepts for the helping professions / Arthur W. Combs, Donald L. Avila, William W. Purkey. - 2d ed. - Boston : Allyn and Bacon, c1978. - ix, 262 p. ; 23 cm. Includes indexes. Bibliography: p. 217-247. ISBN: 0205059597 : Subjects--Topical Terms: Counseling.Helping behavior. Dewey Class. No.: 158/.3