@misc{indiciae7eab87696644,
  title = {Geomagnetic array control circuit},
  author = {Roger Lescelius and D. H. Rohret and R. A. Sneddon and J.N. Towle and D.V. Fitterman},
  year = {1976},
  doi = {10.3133/ofr7661},
  url = {https://pubs.usgs.gov/publication/ofr7661},
  note = {Source identifier: ofr7661}
}