1. National Society for the Study of Education, Rethinking Science Education. Fifty-ninth Yearbook, Part I. University of Chicago Press, Chicago, 1960.
2. Understanding the nature of science: A comparison of scientists and science teachers
3. The Teaching of General Science in Tropical Secondary Schools. Oxford University Press, London, 1955, p. 12.
4. Statement of purposes and objectives of science education in school
5. Association of Science Education, Science and Education Part II: Science in Sixth-form Education. John Murray, London, 1963.