@misc{indiciaea61ba76ffdc8,
  title = {Reverse-thrust technology for variable-pitch fan propulsion systems},
  author = {Sagerser, D. A. and Schaefer, J. W. and Dietrich, D. A.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19780016127},
  note = {Source identifier: 19780016127}
}