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Lerner, H., and Kelman, H. C. (Issue Eds.): "Group methods in psychotherapy, social work and adult education." Journal of Social Issues , 1952, vol. VIII, no. 2.
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Locke, Norman: "Trends in the literature of group psychotherapy ." International Journal of Group Psychotherapy, 1955, 5, 181-184.
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Mallinson, T.J. : "An experimental investigation of group-directed discussion in the classroom." University of Toronto: Unpublished Ph.D. thesis.
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Redl, Fritz: "The meaning of therapeutic milieu" in Symposium on Preventive and Social Psychiatry. Washington, D.C.: Walter Reed Army Institute of Research, 1958.
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Sandison, R.A. : "Group therapy in a provincial out-patient department." International Journal of Social Psychiatry, 1955, 1, 2, 28-32.
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Schutz, William C.: FIRO, A Three-Dimensional Theory of Interpersonal Behavior. New York: Rinehart & Co. Ltd., 1958.
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Stanton, A.H. , and Schwartz, M.S.: The Mental Hospital. New York : Basic Books, 1954.
