Sawyer, W. (1961). What is calculus about? Mathematical Association of America.
Tohutoru Kātū Chicago (17th ed.)Sawyer, W.W. What Is Calculus About? Washington: Mathematical Association of America, 1961.
Tohutoro MLA (9th ed.)Sawyer, W.W. What Is Calculus About? Mathematical Association of America, 1961.
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