Wilson, Gertrude. Social group work practice the creative use of the social process [by] Gertrude Wilson [and] Gladys Ryland. - Boston Houghton Mifflin Co. [1949] - xii, 687 p. 23 cm. Bibliography: p. 623-675. LCCN: 49011016 Subjects--Topical Terms: Social group work LC Class. No.: HV45 / .W5 Dewey Class. No.: 361.8