@misc{indiciae3822b2ce3164,
  title = {Coal fields of the Danforth Hills and Grand Hogback in northwestern Colorado. The Book Cliffs coal field, between Grand River, Colorado, and Sunnyside, Utah. The Durango coal district, Colorado. The Pleasant Valley coal district, Carbon and Emery Counties, Utah. The Iron County coal field, Utah},
  author = {H. S. Gale and G. B. Richardson and J. A. Taff and W. T. Lee},
  year = {1907},
  doi = {10.3133/b316e},
  url = {https://pubs.usgs.gov/publication/b316E},
  note = {Source identifier: b316E}
}