@misc{indiciae27a107b1a175,
  title = {Geologic map of the Gila-San Francisco Wilderness Study Area, Graham and Greenlee Counties, Arizona},
  author = {D.H. Richter and Viki A. Lawrence},
  year = {1981},
  doi = {10.3133/mf1315a},
  url = {https://pubs.usgs.gov/publication/mf1315A},
  note = {Source identifier: mf1315A}
}