TY - RPRT TI - Reconnaissance evaluation of water resources for hydraulic coal mining, Grand Hogback coal field: Garfield and Rio Blanco Counties, Colorado AU - William M. Alley AU - Linda J. Britton AU - Elaine L. Boyd PY - 1978 DO - 10.3133/ofr78885 UR - https://pubs.usgs.gov/publication/ofr78885 ID - ofr78885 ER -