Digging for gold and other precious metals

Por um escritor misterioso

Descrição

Where do the metals we use come from and what determines where we get them from? Dr Julie Robson focuses on the highly sought-after metal of gold, which actually occurs with other metals including silver, copper and lead.
Digging for gold and other precious metals
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Digging for gold and other precious metals
Digging for gold and other precious metals
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Digging for gold and other precious metals
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