@misc{indiciae8f14278c46c5,
  title = {Gravity model improvement using GEOS-3 (GEM 9 and 10)},
  author = {Lerch, F. J. and Klosko, S. M. and Laubscher, R. E. and Wagner, C. A.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780002702},
  note = {Source identifier: 19780002702}
}