@misc{indiciaed07d02780daa,
  title = {Mesozoic stratigraphy of the Santa Rita Mountains, southeast of Tucson, Arizona},
  author = {Harald Drewes},
  year = {1971},
  doi = {10.3133/pp658c},
  url = {https://pubs.usgs.gov/publication/pp658C},
  note = {Source identifier: pp658C}
}