@misc{indiciae4473e6a8417b,
  title = {Temporal variations in low degree zonal harmonics from Starlette orbit analysis},
  author = {Cheng, M. K. and Eanes, R. J. and Shum, C. K. and Schutz, B. E. and Tapley, B. D.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890051997},
  note = {Source identifier: 19890051997}
}