@misc{indiciaecd12fa6383bd,
  title = {Preliminary geologic map of the NE 1/4 Mount Union quadrangle, Yavapai County, Arizona},
  author = {Charles Alfred Anderson and Philip M. Blacet},
  year = {1962},
  doi = {10.3133/ofr621},
  url = {https://pubs.usgs.gov/publication/ofr621},
  note = {Source identifier: ofr621}
}