Yazar
Peter Rushworth
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Cilt sonuçları
Selected references on the geology and coal resources of central and western Colorado coal fields and regions
Peter Rushworth · Colorado Geological Survey, Dept. of Natural Resources
141 sayfa · 1988
Coal / Coal mines and mining / Bibliography / Colorado / Geology
Reconnaissance study of coal fires in inactive Colorado coal mines
Peter Rushworth · Colorado Geological Survey, Dept. of Natural Resources
60 sayfa · 1989
Fires and fire prevention / Coal mines and mining / Abandoned coal mines