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Gold Mining in the Amazon - Amazon Aid Foundation
Amazon.com: Mine the Gap for Mathematical Understanding, Grades 3-5: Common Holes and Misconceptions and What To Do About Them (Corwin Mathematics Series) eBook : SanGiovanni, John J.: Kindle Store
Industrializing Amazon at risk of 'ecosystem collapse'
Mine Design: Examples Using Simulation: Sturgul, John R.: 9780873351812: Amazon.com: Books