References
- Beck , S. J. 1949 . Rorschach's Test; Volume I: Basic Processes, , Revised Edition , New York : Grune and Stratton .
- Bell , J. E. Perceptual Development and the Drawings of Children . Am. J. Orthopsychiat ,
- Friedman , H. 1953 . (Current Journal.) Perceptual Regression in Schizophrenia; an hypothesis suggested by the Use of the Rorschach Test
- Werner , H. 1948 . Comparative Psychology of Mental Development, , Revised Edition , New York : Follett .