1. This is Science. The Association for Childhood Education, Washington, D. C., 1945, p. 8.
2. “Elementary School Science–Implications for High Schools,” National Association of Secondary-School Principals, Bultein 37 (January, 1953), 38–42.
3. Some implications of recent research in the teaching of science at the elementary-school level
4. Needed research in the teaching of elementary science with every teacher a researcher
5. National Society for the Study of Education. Science Education in American Schools. Forty Sixth Yearbook, Part I. University of Chicago Press, Chicago, 1947. p. 135.