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Bruner, J. TOWARD A THEORY OF INSTRUCTION. Harvard Univ. Press , 1966

Caplan, Frank & Theresa, The POWER OF PLAY. New York: Anchor Pr. 1973

Gould, Rosalind. CHILD STUDIES THROUGH FANTASY Quadrangle Press , N.Y. Times, 1972

Gowan, J.C. DEVELOPMENT OF THE CREATIVE INDIVIDUAL. San Diego : Wm. Knapp, 1972

Gowan, J.C. DEVELOPMENT OF THE PSYCHEDELIC INDIVIDUAL. Buffalo : Creative Education Foundation, 1974

Klinger, E. STRUCTURE AND FUNCTION OF FANTASY. New York: Wiley, 1971

Koch, K. WISHES, LIES AND DREAMS, New York: Chelsea House, 1970

Koestler, A. THE ACT OF CREATION: London: Hutchinson , 1964

Kris, E. PSYCHOANALYTIC EXPLORATION IN ART. New York, International University Press, 1952

Kubie, L. NEUROTIC DISTORTION OF THE CREATIVE PROCESS. Lawrence : University of Kansas Press, 1958

Lowenfeld M. PLAY IN CHILDHOOD. New York: Wiley , 1967

Otto, H. and John Mann, Ways Of GROWTH: APPROACHES TO EXPANDING AWARENESS. New York: Viking Press, 1969

Piaget. J. PLAY, DREAMS AND IMITATION IN CHILDHOOD. London : Routledge, Kegan & Paul, 1951

Piers, M.W. (Ed.) PLAY AND DEVELOPMENT. New York: W. W. Norton, 1972

Sullivan H.S. THE INTERPERSONAL THEORY OF PSYCHIATRY New York : W. W. Norton, 1953