@misc{indiciae7d335f747c8f,
  title = {Gravity Probe-B (GP-B) Mission and Tracking, Telemetry and Control Subsystem Overview},
  author = {Kennedy, Paul and Bell, Joseph L.},
  year = {2001},
  url = {https://ntrs.nasa.gov/citations/20010037922},
  note = {Source identifier: 20010037922}
}