National productivity council. (1965). Refractories industry in USA, Britain and West Germany. National productivity council.
シカゴスタイル引用形National productivity council. Refractories Industry in USA, Britain and West Germany. New Delhi: National productivity council, 1965.
MLA引用形式National productivity council. Refractories Industry in USA, Britain and West Germany. National productivity council, 1965.
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