@misc{indiciae40ee3e2c25f4,
  title = {Concepts for autonomous flight control for a balloon on Mars},
  author = {Heinsheimer, Thomas F. and Friend, Robyn C. and Siegel, Neil G.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19890006229},
  note = {Source identifier: 19890006229}
}