@misc{indiciaec094ee6afa1e,
  title = {Engine noise technology},
  author = {Luidens, R. W. and Dietrich, D. R. and Dittmar, J. H. and Goldman, R. G. and Olsen, W. A., Jr. and Miller, B. A.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730024229},
  note = {Source identifier: 19730024229}
}