@misc{indiciae7a04c6952449,
  title = {Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: March 1978},
  author = {J.B. Townshend and J.E. Papp and S.P. Tilton},
  year = {1978},
  doi = {10.3133/ofr78300c},
  url = {https://pubs.usgs.gov/publication/ofr78300C},
  note = {Source identifier: ofr78300C}
}