@misc{indiciae4c3258f625bf,
  title = {A system for model access in tunnels with an unbreathable test medium},
  author = {Howell, R. R. and Joplin, S. D.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19810027268},
  note = {Source identifier: 19810027268}
}