1. The Development Children's Concepts of Causal Relations. Minneapolis: The University of Minnesota Press, 1937.
2. Children's Explanations of Natural Phenomena. New York: Teachers College Bureau of Publications, Columbia University, 1947.
3. The Child's Conception of Physical Causality. New York: Harcourt, Brace and Company, 1930.
4. Conceptogrammatic materials in the teaching of elementary science