1. Chance, C. W. Experimentation in the adaptation of the overhead projector in teaching engineering descriptive geometry curricula. United States Office of Education Project No. 243. (University Microfilm No. 61-3610.) Austin: University of Texas, August 1960.
2. Cogan, M. L. Research on the behavior of teachers: A new phase.The Journal of Teacher Education, 1963,14(3), 240.
3. Cooper, K. S., Sorensen, C. W., & Todd, L. P.The changing old world. New York: Silver Burdett, 1964.
4. Finn, J. D., Perrin, D. G., & Campion, L. E.Studies in the growth of instructional technology, I: AV instrumentation for instruction in the public schools, 1930–1960—a basis for take-off. Washington, D.C.: National Education Association, Department of Audiovisual Instruction, 1962.
5. Flanders, N. D. Analyzing teacher behavior.Educational Leadership, 1961, 19(3), 175–176.