@misc{indiciaeaa39ac32fa25,
  title = {Preliminary geomagnetic data, College Observatory, Fairbanks, Alaska: April 1977},
  author = {J.B. Townshend and J.E. Papp and M.J. Moorman and C.E. Deadmon and S.P. Tilton},
  year = {1977},
  doi = {10.3133/ofr77300d},
  url = {https://pubs.usgs.gov/publication/ofr77300D},
  note = {Source identifier: ofr77300D}
}