@misc{indiciae401ec5535d09,
  title = {Advanced transportation system studies technical area 3: Alternate propulsion system concepts. SSME upper stage use},
  author = {Strangeland, Eric and Levak, Daniel},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19940012625},
  note = {Source identifier: 19940012625}
}