共 50 条
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- [47] SECONDARY RAW-MATERIALS - PROBLEMS OF THEIR UTILIZATION IN THE SOCIALIST INDUSTRIAL FACTORY ZELLSTOFF UND PAPIER, 1982, 31 (04): : 163 - 167
- [49] 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