Mills, Theodore M. Group transformation : an analysis of a learning group / [by] Theodore M. Mills. - Englewood Cliffs, NJ : Prentice-Hall, [1964] Bibliographical footnotes. LCCN: 64021464 Subjects--Topical Terms: Discussion.Small groups. LC Class. No.: LC6519 / .M58 Dewey Class. No.: 301.15018