@misc{indiciae471c1a2e8595,
  title = {Counterrotating aircraft propulsor blades},
  author = {Nelson, Joey L. and Elston, III, Sidney B. and Tseng, Wu-Yang and Hemsworth, Martin C.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/20080004250},
  note = {Source identifier: 20080004250}
}