@misc{indiciaebb5bb5335e25,
  title = {Emissions data by category of engines},
  author = {Barriage, J. and Westfield, W. and Becker, E. E.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19770010144},
  note = {Source identifier: 19770010144}
}