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- [2] RAW-MATERIALS FOR PRODUCTION OF NICKEL AND PROCESSES USED FOR IT STAHL UND EISEN, 1972, 92 (03): : 113 - &
- [6] ECONOMICS ON RAW-MATERIALS BY PLANNED CUTTING OF COMSUMPTION OF RAW-MATERIALS LEBENSMITTEL INDUSTRIE, 1975, 22 (10): : 449 - 450
- [7] RAW-MATERIALS AND THERMAL-PROCESSES (SECTION-A) ERDOL & KOHLE ERDGAS PETROCHEMIE, 1992, 45 (11): : 413 - 415
- [8] METALLSPIEGEL - NEW WAYS IN SEARCHING FOR RAW-MATERIALS AND IN UTILIZATION OF RAW-MATERIALS METALL, 1977, 31 (03): : 216 - 217
- [10] SUPPLY OF RAW-MATERIALS AND AGREEMENT ON RAW-MATERIALS - CONSIDERATIONS OF GERMAN RAW-MATERIALS POLICY WITH REGARD TO 3RD WORLD EUROPA ARCHIV, 1975, 30 (14): : 461 - 470