@misc{indiciaefe3172c7eca5,
  title = {Preliminary geologic map of the Redrock Valley NE quadrangle, Apache Co., Arizona and San Juan Co., New Mexico},
  author = {C. A. Huffman},
  year = {1977},
  doi = {10.3133/ofr77227},
  url = {https://pubs.usgs.gov/publication/ofr77227},
  note = {Source identifier: ofr77227}
}