@misc{indiciae12383f3a9e78,
  title = {Gravity model improvement using GEOS 3 /GEM 9 and 10/},
  author = {Lerch, F. J. and Wagner, C. A. and Klosko, S. M. and Laubscher, R. E.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19790060677},
  note = {Source identifier: 19790060677}
}