1. 1)Booth, N., "The Impact of Science Teaching Projects on Secondary Education", Education in Science, 1975, p. 29
2. 2)Brandow, J. R., "Science Education in Two Countries of the Far East-A Firsthand View", The Science Teacher, October 1970, p. 28
3. 3)Carter, G. J., "Nuffield Combined Science in Comprehensive Schools-a survery-based Enquiry", School Science Review, 58 (205), 1977, pp. 754-755
4. 4)Charles, D. J., "Nuffield Combined Science—an evaluation", School Science Review, 58 (202), 1976, p. 132
5. 5)Gardener, P. L., (editor) "The Structure of Science Education", Longman, Australia, 1975, p. 4