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Bibliography coal resources North, Middle and South Park coal regions, Colorado
Rushworth, Peter.
Colorado Geological Survey.
1984
Colorado Geological Survey
Denver, Colo.
Coal
Colorado
1 online resource (5 p.).
eng
Open file report (Colorado Geological Survey)
NR7.12/84/17/INTERNET
http://hdl.handle.net/10176/co:11816
830545513
2013-04-05T03:33:20.895Z