00991cam a22002171  4500001001300000003000400013005001700017008004100034010001700075035002000092040004600112042001200158050001700170100003700187245020900224260012500433300009200558650003500650700001900685710006900704gs 32000086 DLC20260227111336.0850514s1931    sa aef        000 0 eng c  ags 32000086   a(OCoLC)12034896  aLibrary, U.S. Geological SurveycDSIdDLC  apremarc00aTN810.T7bG71 aGraham, Alexander Chimes,d1892-04aThe coals of the Witbank District (Transvaal)bPt. I. Geology, mining and marketing of Witbank coals,cby A.C. Graham ... Pt. II. The physical and chemical properties of Witbank coals, by P.N. Lategan ...  aJohannesburg,bPublished by the Transvaal Chamber of Mines, Collieries Committee, and printed by Hortors Limited,c1931.  aviii, 169 p. incl. illus., tables. diagrs.b12 fold. pl. (incl. plans, diagrs.)c21 cm. 0aCoalzSouth AfricazTransvaal.1 aLategan, P. N.2 aTransvaal Chamber of Mines, Johannesburg.bCollieries Committee.