@misc{indiciaeff0b22d2d42e,
  title = {The Copernicus project},
  author = {Barnstable, Bob and Polte, Hans and Kepes, Paul and Walker, Kevin and Jacobs, Jeff and Williams, Stephen},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910006739},
  note = {Source identifier: 19910006739}
}