Heap, Ken, Group theory for social workers : an introduction / by Ken Heap. - 1st Eng. ed. - Oxford ; New York : Pergamon Press, 1977. - xiv, 252 p. ; 22 cm. - Social work series . Translation of Gruppeteori for sosialairbeidere. Includes index. ISBN: 0080189563. 0080189555 Subjects--Topical Terms: Social groups.Small groups.Social group work. Dewey Class. No.: 301.185 / HEA N77G