@misc{indiciae7d228b5298bb,
  title = {OGO-A magnetic field observations.},
  author = {Campbell, M. and Heppner, J. P. and Ledley, B. G. and Skillman, T. L. and Sugiura, M.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19680030039},
  note = {Source identifier: 19680030039}
}