@misc{indiciae9b12fee1cc5b,
  title = {Concentrating Trace Gases at Low Pressures},
  author = {Vedder, James F. and O'Hara, Dean and Vo, Tuyen},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19870000456},
  note = {Source identifier: 19870000456}
}