@misc{indiciaecadd49381cca,
  title = {A geopotential model from satellite tracking, altimeter, and surface gravity data: GEM-T3},
  author = {Lerch, F. J. and Nerem, R. S. and Putney, B. H. and Felsentreger, T. L. and Sanchez, B. V. and Marshall, J. A. and Klosko, S. M. and Patel, G. B. and Williamson, R. G. and Chinn, D. S.},
  year = {1994},
  url = {https://ntrs.nasa.gov/citations/19950037857},
  note = {Source identifier: 19950037857}
}