@misc{indiciae3a7c30f08eb6,
  title = {Preliminary geologic map of the Chaco Canyon 1 degree by 1/2 degree Quadrangle, showing coal zones of Fruitland Formation, San Juan, Rio Arriba, and Sandoval counties, New Mexico},
  author = {J. W. Mytton},
  year = {1979},
  doi = {10.3133/mf1104},
  url = {https://pubs.usgs.gov/publication/mf1104},
  note = {Source identifier: mf1104}
}