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المساهمون: Lennes, N. J. (Nels Johann), 1874- joint author
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Other Title: Mathematics of business.
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المساهمون: Goodyear, Samuel Horatio, joint author
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المؤلفون: Moore, John H. (John Henry), 1874-1909
المساهمون: Miner, George W. (George Washington), 1860-1935, joint author
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