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New York, NY [u.a.]: McGraw-Hill, 1965
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New York, NY [u.a.]: McGraw-Hill, 1970
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Sandusky (Ohio): Handbook Publ., 1953
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American Association for the Advancement of Science (AAAS), 1945
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The Science Press, 1945
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American Mathematical Society (AMS), 1940
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JSTOR, 1940
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American Mathematical Society, 1940
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JSTOR, 1935
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American Mathematical Society, 1935
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American Mathematical Society (AMS), 1935
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Ovid Technologies (Wolters Kluwer Health), 1954