1. “CHEM Study-An Approach to Chemistry Based on Experiments,” New Curricula, Ed., Harper and Row, New York, N.Y., 1964, pp. 82–83.
2. Chemical Education Material Study Achievement Test, Semester Examination, W. H. Freeman and Company, San Francisco, Calif., 1963. p. 8.
3. A cognitive preference examination using chemistry content
4. “CHEM Study Achievement Exam Results,” CHEM Study Newsletter, 6, No. 1 (1966).