@misc{indiciaeb51f7ab4889a,
  title = {Preliminary geologic map of the Sand Spring Quadrangle, San Juan County, New Mexico},
  author = {A. C. Huffman},
  year = {1976},
  doi = {10.3133/ofr76408},
  url = {https://pubs.usgs.gov/publication/ofr76408},
  note = {Source identifier: ofr76408}
}