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Dyfyniad Arddull ChicagoDatta, A.K. Materials Management: Procedures, Text and Cases. New Delhi: Prentice-Hall, 1983.
Dyfyniad MLADatta, A.K. Materials Management: Procedures, Text and Cases. Prentice-Hall, 1983.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.