@misc{indiciae418a2d78ef0b,
  title = {Geologic map of the Growler Mountains, Pima and Maricopa counties, Arizona},
  author = {Floyd Gray and R. J. Miller and D. W. Peterson and D. J. May and R. M. Tosdal and Katherine Kahle},
  year = {1985},
  doi = {10.3133/mf1681},
  url = {https://pubs.usgs.gov/publication/mf1681},
  note = {Source identifier: mf1681}
}