@misc{indiciae411a92defe0d,
  title = {Photogeologic map of the Chaco Canyon 4 quadrangle, McKinley County, New Mexico},
  author = {A. N. Kover},
  year = {1967},
  doi = {10.3133/ofr67140},
  url = {https://pubs.usgs.gov/publication/ofr67140},
  note = {Source identifier: ofr67140}
}