@misc{indiciae6b420e6a3d52,
  title = {Geologic map of the Mount Union quadrangle, Yavapai County, Arizona},
  author = {Charles Alfred Anderson and Philip M. Blacet},
  year = {1972},
  doi = {10.3133/gq997},
  url = {https://pubs.usgs.gov/publication/gq997},
  note = {Source identifier: gq997}
}