@misc{indiciae1ccb0c305d51,
  title = {Cryogenic star-tracking telescope for Gravity Probe B},
  author = {Everitt, C. W. F. and Van Patten, R. A. and Davidson, D. E.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19870039389},
  note = {Source identifier: 19870039389}
}