@misc{indiciae0eea3ab12665,
  title = {Transcontinental geophysical survey (35°-39° N) geologic map from 100° to 112° W longitude},
  author = {J. E. Carlson and Ronald Willden},
  year = {1968},
  doi = {10.3133/i533c},
  url = {https://pubs.usgs.gov/publication/i533C},
  note = {Source identifier: i533C}
}