Combs, Arthur W. 1912-1999. Helping relationships : basic concepts for the helping professions/ [by] Arthur W. Combs, Donald L. Avila [and] William W. Purkey. - Boston : Allyn and Bacon, [1971]. - vii, 360 p. : 22 cm. Bibliography: p. 312-339. LCCN: 78144036 Subjects--Topical Terms: Counseling.Helping behavior. LC Class. No.: BF637.C6 / C48 1971 Dewey Class. No.: 158/.3