Durkin, Helen Elise, 1901- The group in depth [electronic resource] / [by] Helen E. Durkin.. — New York, : International Universities Press, [1965, c1964]. — xii, 378 p. 23 cm. Bibliography: p. 353-366. LCCN: 64007550 Subjects--Topical Terms: Group psychotherapy.Psychotherapy, Group. LC Class. No.: RC488 / .D78 Dewey Class. No.: 616.8915 National Library of Medicine Call No.: WM 430 D963g 1964