@misc{indiciaefc2cb7c0d0d6,
  title = {Preliminary map showing total magnetic intensity in part of Naval Petroleum Reserve no. 4, Alaska},
  year = {1946},
  doi = {10.3133/gp5},
  url = {https://pubs.usgs.gov/publication/gp5},
  note = {Source identifier: gp5}
}