@misc{indiciae4568b427637f,
  title = {An automated atmospheric sampling system operating on 747 airliners},
  author = {Perkins, P. J. and Gustafsson, U. R. C.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19760042997},
  note = {Source identifier: 19760042997}
}