@misc{indiciae4941d23d4c2b,
  title = {Aeronautic Instruments. Section II : Altitude Instruments},
  author = {Mears, A H and Henrickson, H B and Brombacher, W G},
  year = {1923},
  url = {https://ntrs.nasa.gov/citations/19930091189},
  note = {Source identifier: 19930091189}
}