@misc{indiciaedef9bdacbf72,
  title = {Plutonic rocks of the Santa Rita Mountains, southeast of Tucson, Arizona},
  author = {Harald D. Drewes},
  year = {1976},
  doi = {10.3133/pp915},
  url = {https://pubs.usgs.gov/publication/pp915},
  note = {Source identifier: pp915}
}