1. & The development of a Piagetian paper and pencil test for assessing concrete operational reasoning. Unpublished doctoral dissertation, University of Northern Colorado, Greeley, Colorado, 1974.
2. & Basic concepts in reading. Columbus, Ohio: Charles E. Merrill Publishing Company, 1972.
3. An investigation of the correlation differences in science concepts held by fifth grade Mexican and Anglo-American students: A cross-cultural study. Unpublished doctoral dissertation, University of Northern Colorado, Greeley, Colorado, 1975.
4. Piaget and conceptual development. New York: Holt, Rinehart & Winston, 1970.
5. & Educating the Mexican American. Valley Forge, Pa.: Judson Press, 1970.