Spelling suggestions: "subject:"goal lines anda mining - conomic aspects"" "subject:"goal lines anda mining - c:conomic aspects""
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Mineraalekonomiese ondersoek ten einde die invloed van steenkoollaagdikte en -diepte op die optimale ekstraksie te bepaal16 April 2014 (has links)
M.Phil. (Mineral Economics) / Please refer to full text to view abstract
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