@misc{indiciaed0f18409ec4a,
  title = {Improved molecular sorbent trap for high-vacuum systems},
  author = {Knechtel, E. D. and Pitts, W. C.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710000475},
  note = {Source identifier: 19710000475}
}