01020cam a22002291 4500 gs 32000086 DLC 20260227111336.0 850514s1931 sa aef 000 0 eng c gs 32000086 (OCoLC)12034896 Library, U.S. Geological Survey DSI DLC premarc TN810.T7 G7 Graham, Alexander Chimes, 1892- The coals of the Witbank District (Transvaal) Pt. I. Geology, mining and marketing of Witbank coals, by A.C. Graham ... Pt. II. The physical and chemical properties of Witbank coals, by P.N. Lategan ... Johannesburg, Published by the Transvaal Chamber of Mines, Collieries Committee, and printed by Hortors Limited, 1931. viii, 169 p. incl. illus., tables. diagrs. 12 fold. pl. (incl. plans, diagrs.) 21 cm. Coal South Africa Transvaal. Lategan, P. N. Transvaal Chamber of Mines, Johannesburg. Collieries Committee. 26952 26952