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& Peat-- Environmental Aspects
1
& Peat-- Mining
1
01 Coal
1
010900 -- Coal
Alaska
And Peat
1
Coal Deposits
1
Coal Mining
1
Forecasting
1
Geologic Deposits
1
Institutional Factors
1
Lignite
1
Mining
North America
Pacific Northwest Region
1
Planning
1
Resources
1
Socio-Economic Factors
1
Surface Mining
1
Usa 012000* -- Coal
1
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