@misc{indiciae77c94c9e9989,
  title = {Nuclear stage configuration studies for Mars missions},
  author = {Emrich, W. J., Jr. and Young, A. C. and Mulqueen, J. A.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910025526},
  note = {Source identifier: 19910025526}
}