Wilson, G. M. (1919). A Survey of the social and business usage of arithmetic.
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Dyfyniad Arddull Chicago
Wilson, Guy Mitchell. A Survey of the Social and Business Usage of Arithmetic. New York, 1919.
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Dyfyniad MLA
Wilson, Guy Mitchell. A Survey of the Social and Business Usage of Arithmetic. 1919.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.