@misc{indiciae977c94753749,
  title = {Lunar lander and return propulsion system trade study},
  author = {Hurlbert, Eric A. and Moreland, Robert and Sanders, Gerald B. and Robertson, Edward A. and Amidei, David and Mulholland, John},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19940012023},
  note = {Source identifier: 19940012023}
}