@misc{indiciaeef7355b0b7e0,
  title = {Advanced space transportation systems},
  author = {Disher, J. H. and Hethcoat, J. P. and Page, M. A.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810060240},
  note = {Source identifier: 19810060240}
}