@misc{indiciae09e91478083f,
  title = {The Pathfinder Chemical Transfer Propulsion Program},
  author = {Hannum, Ned P. and Berkopec, Frank D. and Zurawski, Robert L.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900009155},
  note = {Source identifier: 19900009155}
}