@misc{indiciaee33bd1b23be2,
  title = {Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska, May 1991},
  author = {John B. Townshend and Richard V. O’Connell and Carol Ann Varner},
  year = {1991},
  doi = {10.3133/ofr91300e},
  url = {https://pubs.usgs.gov/publication/ofr91300E},
  note = {Source identifier: ofr91300E}
}