50080812
9780260397935
Feldtmann, W. R is the author of 'Notes on Gold Extraction : By Means of Cyanide of Potassium (MacArthur-Forrest Patents), As Carried Out on the Witwatersrand Gold Fields, Transvaal, South Africa (Classic Reprint)', published 2017 under ISBN 9780260397935 and ISBN 0260397938.
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