TY - RPRT TI - Lithologic and geophysical logs of seven holes drilled in 1975 in the Yampa and Danforth Hills coal fields, northwestern Colorado AU - Sean Conroy Muller PY - 1976 DO - 10.3133/ofr76383 UR - https://pubs.usgs.gov/publication/ofr76383 ID - ofr76383 ER -