@misc{indiciaeb303fcb81e33,
  title = {Mineral resources of the Ragged Top Wilderness Study Area, Pima County, Arizona},
  author = {G.A. Nowlan and J.A. Peterson and J. A. Pitkin and W. F. Hanna and T. J. Kreidler},
  year = {1989},
  doi = {10.3133/b1702h},
  url = {https://pubs.usgs.gov/publication/b1702H},
  note = {Source identifier: b1702H}
}