Group treatment in psychotherapy : a report of experience / by Robert G. Hinckley and Lydia Hermann. Hinckley, Robert G. (Robert George), 1904- Hermann, Lydia Marie, 1909- Group psychotherapy. RC488 .H5 131.32 HIG Bibliographical references and index. Minneapolis : University of Minnesota Press, 1951. 1951. 1951 Text 136 p.; eng