Columbia subject headings:
Harvard subject headings:
Autobiographies
Clark Fork Watershed (Mont. and Idaho)
Copper mines and mining--Environmental aspects--Clark Fork Watershed (Mont. and Idaho)
Copper mines and mining--Waste disposal--Montana--Opportunity Region.
Tyer, Brad
Princeton subject headings:
Copper mines and mining--Environmental aspects--Clark Fork Watershed (Mont. and Idaho).
Copper mines and mining--Waste disposal--Montana--Opportunity Region.