@misc{indiciaed4bc889b8e17,
  title = {Advanced manned launch system study status},
  author = {Freeman, Delma C., Jr. and Wilhite, Alan W. and Talay, Theodore A.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920029941},
  note = {Source identifier: 19920029941}
}