@misc{indiciaec39e4e87ecdf,
  title = {Energy Efficient Engine Program: Technology Benefit/Cost Study, Volume II},
  author = {Gray, D. E. and Gardner, W. B.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19900019249},
  note = {Source identifier: 19900019249}
}