@misc{indiciae7b199ca481ff,
  title = {Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: June 1980},
  author = {John B. Townshend and J.E. Papp and E.A. Sauter and S.P. Tilton},
  year = {1980},
  doi = {10.3133/ofr80300f},
  url = {https://pubs.usgs.gov/publication/ofr80300F},
  note = {Source identifier: ofr80300F}
}