@misc{indiciae882bdf4c3a55,
  title = {Using Unmanned Aircraft Systems (UAS) for Remote Sensing: Airspace Access Challenges},
  author = {Mulac, Brenda L.},
  year = {2009},
  url = {https://ntrs.nasa.gov/citations/20090035734},
  note = {Source identifier: 20090035734}
}