@misc{indiciaea437929de937,
  title = {Maps showing residual magnetic intensity along the California coast, lat 37°30'N to lat 34°30'N},
  author = {David S. McCulloch and Rodger H. Chapman},
  year = {1977},
  doi = {10.3133/ofr7779},
  url = {https://pubs.usgs.gov/publication/ofr7779},
  note = {Source identifier: ofr7779}
}