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by 
Elbra, Ainsley. author
Format: 
Alıntı: 
Governing African gold mining : private governance and the resource curse / Elbra, Ainsley. author
by 
Herfindahl, Orris C., (Orris Clemens), 1918- author
Format: 
Alıntı: 
Resource economics : selected works of Orris C. Herfindahl / Herfindahl, Orris C., (Orris Clemens
by 
Bourgouin, France, editor of compilation.
Format: 
Alıntı: 
Mines and mineral resources -- Developing countries.