18thcentury 19thcentury accidents air anaconda casestudies commodityexchanges control copper copperbeltprovince copperminers copperminesandmining coppersmelting coppersupply economicconditions economicstabilization environmentalaspects environmentalprotection greatbritain healthaspects history historyvivianandsons(firm) industrialization japan keweenawpeninsula mathematicalmodels michigan mining miningengineering montana nonferrousmetalindustries occupational occupationaldiseases occupationalhealthservices politicalaspects politicalstability politicsandgovernment pollution prevention riotintocompany safetymeasures smelting socialconditions sources spain speculation standards sumitomofamily unitedstates urbananthropology urbanization wa440g633a1979 zambia