Nuffield Foundation. Mathematics Project. (1967). I do and I understand / Nuffield Foundation. Mathematics Project. Nuffield Foundation.
Chicago-viite (17. p.)Nuffield Foundation. Mathematics Project. I Do and I Understand / Nuffield Foundation. Mathematics Project. New York: Nuffield Foundation, 1967.
MLA-viite (9. p.)Nuffield Foundation. Mathematics Project. I Do and I Understand / Nuffield Foundation. Mathematics Project. Nuffield Foundation, 1967.
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