@misc{indiciae7ad01b9f5500,
  title = {Orbit Transfer Vehicle (OTV) engine phase A study, extension 1. Volume 3: Study cost estimates},
  author = {Christensen, K. L.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19810003651},
  note = {Source identifier: 19810003651}
}