@misc{indiciae5c4a17fb69dc,
  title = {Hybrid propulsion technology program. Volume 1: Conceptional design package},
  author = {Jensen, Gordon E. and Holzman, Allen L. and Leisch, Steven O. and Keilbach, Joseph and Parsley, Randy and Humphrey, John},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19900012477},
  note = {Source identifier: 19900012477}
}