@misc{indiciae3385396b8b65,
  title = {Program manual for HILTOP, a heliocentric interplanetary low thrust trajectory optimization program. Part 1: User's guide},
  author = {Mann, F. I. and Horsewood, J. L.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19750020012},
  note = {Source identifier: 19750020012}
}