@misc{indiciaed0fed5ff3513,
  title = {An accelerated development, reduced cost approach to lunar/Mars exploration using a modular NTR-based space transportation system},
  author = {Borowski, S. and Clark, J. and Sefcik, R. and Corban, R. and Alexander, S.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920074429},
  note = {Source identifier: 19920074429}
}