00864cam a22002411 4500 gs 50000047 DLC 20260227111356.0 810425s1941 sa b f000 0 eng c gs 50000047 (OCoLC)7367054 U.S. Geol. Survey. Library ViBlbV ViBlbV DLC QE325 .A53 no. 13 TN490.T9 J6 Copy 2. 553.46 Joubert, G. K. (Gideon Krige), 1903- Tungsten ores in South Africa with special reference to Namaqualand and the Orange River. Pretoria, Govt. Printer, 1941. 8 p. fold. map. 24 cm. South Africa. Dept. of Mines. Geological series. Bulletin no. 13 Tungsten ores South Africa. South Africa. Geological Survey. Geological series. Bulletin no. 13. 28434 28434