@misc{indiciaeb14e87f6af05,
  title = {Space Transportation System design for operations in the 2000+ era},
  author = {Ehrlich, C. F., Jr. and Stone, H. W., Jr.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920074644},
  note = {Source identifier: 19920074644}
}