00972cam a22002411a 4500001001300000003000400013005001700017008004100034010001700075035001900092040005400111042001200165050001700177100004200194245014100236260004700377300005800424500010100482650003400583650004000617710003700657740003600694gs 29000242 DLC20260227111333.0821220s1929    sa abf        000 0 eng c  ags 29000242   a(OCoLC)9069974  aU.S. Geological Survey, LibrarycPPANdOCoLCdDLC  apremarc00aTN490.M3bN41 aNel, Louis T.q(Louis Taylor),d1895-14aThe geology of the Postmasburg manganese deposits and the surrounding country.bAn explanation of the geological map /cby Louis T. Nel.  aPretoria :bThe Government printer,c1929.  a109 p., [XII] leaves of plates :bill., map ;c25 cm.  aAt head of title : Union of South Africa. Department of mines and industries. Geological survey. 0aManganese oreszSouth Africa. 0aGeologyzSouth AfricazPostmasburg.2 aGeological Survey (South Africa)0 aPostmasburg manganese deposits.