1. Application of Orsat stack gas analyser to geochemical exploration research;Ball;Trans. Inst. Min. Metall.,1983
2. Effects of atmospheric variables on certain soil gases used to detect buried ore deposits;Ball;Trans. Inst. Min. Metall.,1983
3. The geology of the country around Gatooma;Bliss;Bull. Rhod. Geol. Surv.,1970
4. The geochemistry of gold and its deposits;Boyle,1979
5. The palaeoclimatic significance of caves and adjacent landforms in Western Ngamiland, Botswana;Cooke;Geogr. J.,1973