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- [24] DIAMOND GRINDING OF FERROUS AND NON-FERROUS-METALS INDUSTRIAL DIAMOND REVIEW, 1974, (OCT): : 371 - 371
- [25] NON-FERROUS-METALS IMPORTS AND EXPORTS BY FRG IN 1973 PRODUCTION OF NON-FERROUS-METALS INDUSTRY METALL, 1974, 28 (05): : 535 - 535
- [26] CURRENT TRENDS AND PROBLEMS OF GERMAN NON-FERROUS-METALS INDUSTRY METALL, 1974, 28 (12): : 1203 - 1206