National productivity council. (1965). Refractories industry in USA, Britain and West Germany. National productivity council.
Chicago Edition CitationNational productivity council. Refractories Industry in USA, Britain and West Germany. New Delhi: National productivity council, 1965.
MLA引文National productivity council. Refractories Industry in USA, Britain and West Germany. National productivity council, 1965.
警告:這些引文格式不一定是100%准確.