1. Evaluation of copper-zinc gossans in southern Africa;Andrew;Trans. Inst. Min. Metall., Trans.,1977
2. The geology, mineralogy and geochemistry of selected base-metal gossans in southern Africa;Andrew,1979
3. Supergene alteration and gossan textures of base-metal ores in southern Africa;Andrew;Miner. Sci. Eng.,1980
4. Interpretation of leached outcrops;Blanchard;Nev. Bur. Mines Geol., Bull.,1968
5. The geochemistry of silver and its deposits;Boyle;Geol. Surv. Can. Bull.,1968