James Paul Johnson eBooks
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The Ore Deposits of South Africa: With a Chapter on Hints to Prospectors; Base Metals. E-book. Formato PDF
James Paul Johnson
edizioni Forgotten Books collana , 2017
It is also intended as a guide to the prospector. Only an elementary knowledge Of geology and some mining experience are necessary in order to understand it. With these qualifica tions, it will materially assist him in his search for metallifcr ous mineral occurrences and, so far as simple ores are con cerned, should...