Schiffer, Mortimer. The therapeutic play group. - London : Allen and Unwin, 1971. Includes bibliographical references. ISBN: 0043610137 L.2.75 LCCN: 76502076 Nat. Bib. No.: B71-22689 Subjects--Topical Terms: Play therapy.Play therapy. LC Class. No.: RJ505.P6 / S3 1971 Dewey Class. No.: 618.92/8/915 National Library of Medicine Call No.: WM 450 S333t 1969