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World resources : energy, metals, minerals ; studies in economic and political geography
Alexandersson, Gunnar, (1978)
Bundesrepublik Deutschland Rohstoffsituation ...
Mineral resources: a system analytical and functional approach
Kapolyi, László, (1987)
Mining royalties : a global study of their impact on investors, government and civil society
Otto, James M., (2006)
Union of the Comoros : selected issues and statistical appendix
Matungulu, Mbuyamu, (2009)
Democratic Republic of the Congo: selected issues and statistical appendix
Briançon, Cyrille, (2007)