@misc{indiciae6d1b49b0e42c,
  title = {Optimal selection of space transportation fleet to meet multi-mission space program needs},
  author = {Morgenthaler, George W. and Montoya, Alex J.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19940004211},
  note = {Source identifier: 19940004211}
}