@misc{indiciae17efacff0efa,
  title = {Error analyses of resonant orbits for geodesy},
  author = {Douglas, B. C. and Martin, C. F. and Wagner, C. A. and Williamson, R. G.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690016012},
  note = {Source identifier: 19690016012}
}