@misc{indiciaeb1685c35edb2,
  title = {The GRACE Mission: Technical Challenges},
  author = {Davis, E. and Stanton, R. and Thomas, J. and Dunn, C.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20060040560},
  note = {Source identifier: 20060040560}
}