Pollak, Gertrude K. Leadership of discussion groups case material and theory Gertrude K. Pollak. - New York Spectrum Publications : distributed by Halsted Press [1975] - 391 p. 24 cm. Includes index. Bibliography: 369-372. ISBN: 0470691751 (Halsted) LCCN: 75022050 Subjects--Topical Terms: Family life educationGroup counseling LC Class. No.: HQ10 / .P57 Dewey Class. No.: 808.53