@misc{indiciaee5da790baaad,
  title = {Gravity model comparison using Geos-1 long arc orbital solutions},
  author = {Lerch, F. J. and Marsh, J. G. and Oneill, B.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19680012125},
  note = {Source identifier: 19680012125}
}