Bosstick, M. (1975). Patterns in the sand an exploration in mathematics. Glencoe Press.
Chicago-viite (17. p.)Bosstick, Maurice. Patterns in the Sand an Exploration in Mathematics. Glencoe Press, 1975.
MLA-viite (9. p.)Bosstick, Maurice. Patterns in the Sand an Exploration in Mathematics. Glencoe Press, 1975.
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