@misc{indiciae84575035b331,
  title = {Technology R\&D for space commerce},
  author = {Sadin, Stanley R. and Christensen, Carissa B. and Steen, Robert G.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920072985},
  note = {Source identifier: 19920072985}
}