1. (1975). Strips and liquids. ITV Handbook for Teachers–Science for the Seventies. Harrisburg, PA: Pennsylvania Department of Education.
2. & (1964). Social learning and personal development. New York: Holt, Rinehart and Winston.
3. (1970). Piaget and elementary science. In and (Ed.) Readings in science education for the elementary school. New York: Macmillan.