@misc{indiciaec2fff8bae0bc,
  title = {Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: June 1981},
  author = {John B. Townshend and J.E. Papp and E.A. Sauter},
  year = {1981},
  doi = {10.3133/ofr81300f},
  url = {https://pubs.usgs.gov/publication/ofr81300F},
  note = {Source identifier: ofr81300F}
}