ocr: KUSGS science for a changing world E cofessional-le aper 1625MA Disci Version 12 Rocky Mts.and. GreatPlains HRIRLININ National Coal Resource Assessment 1999 Résource Assessntent of Selécted Tertiary Coal Beds: and Zones in-the Northern Rocky Mountains and Great Plains Region U.S.Department of the Interior U.S.Geological Survey,
