== Литература ==
* Woytinsky, W. S., and E. S. Woytinsky. ''World Population and Production Trends and Outlooks'' (1953) pp 749–881; with many tables and maps on the worldwide mining industry in 1950, including coal, metals and minerals
* Ali, Saleem H. (2003) ''Mining, the Environment and Indigenous Development Conflicts''. Tucson AZ: University of Arizona Press.
* Ali, Saleem H. (2009) ''Treasures of the Earth: need, greed and a sustainable future''. New Haven and London: Yale University Press