W R Feldtmann

W R Feldtmann is the author of "Notes on Gold Extraction", "Notes on Gold Extraction by Means of Cyanide of Potassium (MacArthur-Forrest Patents)", "Notes on Gold Extraction by Means of Cyanide of Potassium , As Carried Out on the Witwatersrand Gold Fields, Transvaal,...

Books by W R Feldtmann

Notes on Gold Ext...
Feldtmann, W. R
Paperback: $15.75

Notes on Gold Ext...
Feldtmann, W. R
Paperback: $15.95

Notes on Gold Ext...
Feldtmann, W. R
Paperback: $9.95

Notes on Gold Ext...
Feldtmann, W. R
Paperback: