@misc{indiciae58cc3f59e4e0,
  title = {Operationally Efficient Propulsion System Study (OEPPS)},
  author = {Wong, G. S. and Waldrop, G. S. and Byrd, R. J. and Ziese, J. M.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910018884},
  note = {Source identifier: 19910018884}
}