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Gold ores --- Gold ores. --- California.
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Silver ores --- Lead ores --- Zinc ores --- Ore deposits --- Ore deposits.
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Ore deposits --- Beryllium ores --- Tin ores --- Tungsten ores --- Ore deposits.
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Silver ores --- Lead ores --- Zinc ores --- Ore deposits
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Ore deposits --- Beryllium ores --- Tin ores --- Tungsten ores
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Geochemical prospecting. --- Humus. --- Gold ores --- Gold ores.
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