@misc{indiciae5b2368ae4e83,
  title = {Generic Airspace Survey},
  author = {Mogford, Richard H. and Bridges, Wayne and Gujarl, Vimmy and Lee, Paul U. and Preston, William},
  year = {2013},
  url = {https://ntrs.nasa.gov/citations/20140008922},
  note = {Source identifier: 20140008922}
}