@misc{indiciaeea66a06bf473,
  title = {Preliminary geologic and structure contour maps of the Hard Ground Flats Quadrangle, McKinley County, New Mexico},
  author = {A. R. Kirk and R. S. Zech},
  year = {1976},
  doi = {10.3133/ofr76859},
  url = {https://pubs.usgs.gov/publication/ofr76859},
  note = {Source identifier: ofr76859}
}