@misc{indiciae39d9b958d05d,
  title = {Satellite trajectory determination and their expected errors OGO-IV, GEOS-I},
  author = {Vonbun, F. O.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700069420},
  note = {Source identifier: 19700069420}
}