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Active permitted mine operations in Colorado, 1995-96 : directory
Hemborg, H. Thomas.
Colorado Geological Survey.
1996
Colorado Geological Survey, Dept. of Natural Resources
Denver, Colo.
Mineral industries Concessions
Colorado
Directories
1 online resource (v, 52 p.) : ill., map.
eng
Information series (Colorado Geological Survey)
NR12/20.10/41/INTERNET
http://hdl.handle.net/10176/co:11067
805608475
2012-09-13T21:59:03.294Z