@misc{indiciaed64753595e36,
  title = {Hubble Space Telescope precision pointing control system},
  author = {Beals, G. A. and Crum, R. C. and Dougherty, H. J. and Hegel, D. K. and Kelley, J. L.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19880049481},
  note = {Source identifier: 19880049481}
}