@misc{1166471,
  author = {William F Mullis and Wade H Askew},
  title = {Preliminary report on the development of helicopter blade tip lights for formation flying:},
  year = {1960},
  month = {1960-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.RPT.6835},
  language = {en},
}