ocr: EUSGS science fora a changing worid - - - - - - - - - 3 7 - - - - - - - - - - - - - - - - - - - National Coal Resource Assessment 1999 RESOURCE ASSESSMENT OF SELECTED TERTIARY COAL BEDS AND ZONES IN THE NORTHERN ROCKY MOUNTAINS AND GREAT PLAINS REGION U.S. Geological Survey Professional Paper 1625-A By Fort Union Coal Assessment Team Disc 2--Interactive Maps
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