Mcmahon, Gary, et al. Environmental Study of Artisanal, Small and Medium Mining in Bolivia, Chile and Peru,
The World Bank, 1999, IX, 61 с, 0-8213-4428-5.
Mcmahon, Gary, et al. .
Environmental Study of Artisanal, Small and Medium Mining in Bolivia, Chile and Peru.
Washington: The World Bank, 1999, IX, 61 с, 0-8213-4428-5.
Mcmahon, Gary, et al. (1999)
Environmental Study of Artisanal, Small and Medium Mining in Bolivia, Chile and Peru,
Washington: The World Bank, IX, 61 с, 0-8213-4428-5
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