1. Processing of tungsten;Borchers,1979
2. Tin volatilization: smaller plants for mines and smelters;Denholm,1984
3. Processing of low grade tungsten concentrates of Degana;Subramanian;Trans. Indian Inst. Met.,1992
4. Extraction of tungsten from scheelite concentrate by soda ash roast–leach method;Paramguru;Trans. Inst. Min. Metall.,1990
5. The geology of tungsten;Horsnail,1979