1. American Association for the Advancement of Science. The psychological bases of Science-A Process of Approach. Washington, D.C.: AAAS, 1965.
2. American Association for the Advancement of Science. Science process instrument. Washington, D.C.: AAAS, 1970.
3. The nature of abilities. In (Ed.), Talent and education. Minneapolis: University of Minnesota Press, 1960.
4. Ecological psychology. Stanford: Stanford University Press, 1968.
5. A Socio-Economic Index for Occupations In Canada*