@misc{indiciae9b450d897c6b,
  title = {Reduction of blade-vortex interaction noise using higher harmonic pitch control},
  author = {Brooks, Thomas F. and Booth, Earl R., Jr. and Jolly, J. Ralph, Jr. and Yeager, William T., Jr. and Wilbur, Matthew L.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890018094},
  note = {Source identifier: 19890018094}
}