Bereiter, C. (1979). Bargains galore: Mathematical thinking stories and problems. Open Court.
Tohutoru Kātū Chicago (17th ed.)Bereiter, Carl. Bargains Galore: Mathematical Thinking Stories and Problems. Illinois: Open Court, 1979.
Tohutoro MLA (9th ed.)Bereiter, Carl. Bargains Galore: Mathematical Thinking Stories and Problems. Open Court, 1979.
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