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Dyfyniad Arddull ChicagoNisha, P.K. Quality Cost Estimation and Reduction. Cochin: Department of statistics, 2004.
Dyfyniad MLANisha, P.K. Quality Cost Estimation and Reduction. Department of statistics, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.