Hinckley, Robert G. Group treatment in psychotherapy : a report of experience / Robert G. Hinckley and Lydia Hermann. - Minnesota : University of Minnesota press, c 1951. - ix, 136 p. ; 23 cm. Includes index. 314 314 Subjects--Topical Terms: Psychotherapy. Group psychotherapy. Dewey Class. No.: 616.89 / H583g