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W r Feldtmann
W r Feldtmann is the author of "Notes on Gold Extraction by Means of Cyanide of Potassium" and "Notes on Gold Extraction by Means of Cyanide of Potassium, Macarthur-Forrest Patents, As Carried Out on the Witwatersrand Gold Fields, Transvaal, Sout".
Books by W r Feldtmann
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Notes on Gold Ext...
Feldtmann, W. r.
Paperback:
$15.75
Notes on Gold Ext...
Feldtmann, W. r.
Hardback:
$30.95