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General description; color variations; uses and specifications; substitutes; artificial ocher; mining and treatment; domestic deposits in Georgia, Pennsylvania, Virginia and other states; status of domestic industry; discussion of French ocher industry. (see also Rock Products, vol. 32, no. 18, Aug. 31, 1929, pp. 73-75)
General description; color variations; uses and specifications; substitutes; artificial ocher; mining and treatment; domestic deposits in Georgia, Pennsylvania, Virginia and other states; status of domestic industry; discussion of French ocher industry. (see also Rock Products, vol. 32, no. 18, Aug. 31, 1929, pp. 73-75)
Ocher and ochery earths
U. S. Bur. Mines -- Information Cir
Santmyers, R.M. (author)
1929
20 pages
Article (Journal)
English
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