@misc{indiciaeb0147ba5118b,
  title = {Aeromagnetic map of parts of the Mother Lode gold and Sierra Foothills copper mining districts, California, and its geologic interpretation},
  author = {J. R. Henderson and A. A. Stromquist and Anna Jespersen},
  year = {1966},
  doi = {10.3133/gp561},
  url = {https://pubs.usgs.gov/publication/gp561},
  note = {Source identifier: gp561}
}