TY - RPRT TI - Chemical analyses of coal and coal-associated rock samples from the Coalmont Formation, McCallum and Coalmont areas, North Park, Jackson County, Colorado AU - Joseph R. Hatch AU - Dawn Madden AU - Ronald H. Affolter PY - 1979 DO - 10.3133/ofr791099 UR - https://pubs.usgs.gov/publication/ofr791099 ID - ofr791099 ER -