@misc{indiciaea62f3ca4323e,
  title = {General aviation piston-engine exhaust emission reduction},
  author = {Kempke, E. E., Jr. and Houtman, W. H. and Westfield, W. T. and Duke, L. C. and Rezy, B. J.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780003130},
  note = {Source identifier: 19780003130}
}