@misc{indiciae63ec0bb126b2,
  title = {Backstreaming from oil diffusion pumps Quarterly progress report, 1 Jan. - 31 Mar. 1966},
  author = {Langdon, W. M.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660014207},
  note = {Source identifier: 19660014207}
}