@misc{indiciae47034e22c17c,
  title = {Earth's bow shock - Elapsed-time observations by two closely spaced satellites.},
  author = {Colburn, D. S. and Green, I. M. and Greenstadt, E. W.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690034310},
  note = {Source identifier: 19690034310}
}