@misc{indiciaee3c4458be94d,
  title = {CF6-6D engine performance deterioration},
  author = {Wulf, R. H. and Kramer, W. H. and Pass, J. E. and Smith, J. J.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19800018863},
  note = {Source identifier: 19800018863}
}