1
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QA475 .C6
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Solid geometry
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London, [ United Kingdom ] : Routledge and Kegan Paul , 1968
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Cohn, P. M
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48207
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2
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QA475 .W4
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Solid geometry/by A. M. Welchons, W. R. Krickenberger and Helen R. Pearson
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Boston, [ United States ] : Ginn and Company , 1959
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Welchons, A.M.
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112998
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