@misc{indiciaec6955c6a43b6,
  title = {ULDA user's guide},
  author = {Perry, Charleen and Driessen, Cornelius and Pasian, Fabio},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19910022499},
  note = {Source identifier: 19910022499}
}