1. The psychology of meaningful verbal learning. New York: Gruen and Stratson, 1963.
2. Biological Sciences Curriculum Study. High school biology (Green Version) 2nd Edition. University of Colorado, Boulder. Rand McNally & Co., 1969.
3. , , , & (Eds.) Taxonomy of educational objectives: the classification of educational goals, handbook I: Cognitive domain. New York: McKay, 1956.
4. The degree to which children conceptualize from science experience
5. Time span of discretion in the high school occupational curriculum. Berkeley, California. The Wright Institute for the California State Department of Vocational Education, 1971.