00936cam a22002531 4500 gs 36000047 DLC 20260227111340.0 810309s1935 sa ab 000 0 eng c gs 36000047 (OCoLC)7209232 U.S. Geol. Survey Libr. ViBlbV DLC premarc QE325 .A53 no. 6 Kupferbürger, Wilhelm, 1896- Corundum in the Union of South Africa, by W. Kupferbürger ... Publication of the Geological Survey Division. Pretoria, The Government Printer, 1935. 81 p. incl. maps (1 fold.), tables, diagrs. 24 cm. South Africa. [Geological survey] Geological series. Bulletin no. 6 At head of title: Union of South Africa. Department of Mines. Bibliography: p. 65. Corundum. Mines and mineral resources South Africa. 27241 27241