@misc{indiciae33885e151fc5,
  title = {Advanced manned launch system study status},
  author = {Freeman, Delma C., Jr. and Wilhite, Alan W. and Talay, Theodore A.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930061448},
  note = {Source identifier: 19930061448}
}