An environmental study of artisanal, small, and medium mining in Bolivia, Chil, and Peru / Gary McMahon... [et al.]
CoauthorMcMahon, GaryCountryEstados Unidos.PublicationWashington : Worl Bank, cop. 1999DescriptionIX, 61 p. ;
28 cmSeriesWorld Bank technical paper , 429)ISBN0-8213-4428-5 CDU622
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