theoretical problems in the processing of mineral raw materials

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6 32 abstract processing of raw materials by the producer countries themselves has frequently been recommended as an appropriate way for developing countries to increase their domestic value added and achieve positive

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raw material 'criticality'sense or nonsense?

0 32 the past decade has seen a resurgence of interest in the supply security of mineral raw materials a key to the current debate is the concept of 'criticality' the present article reviews the criticality concept as well as the

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