@misc{indiciaea2f4ce24c2dd,
  title = {Microbial Check Valve for Shuttle},
  author = {Colombo, G. V. and Putnam, D. F. and Sauer, R. L.},
  year = {1978},
  url = {https://ntrs.nasa.gov/citations/19790028563},
  note = {Source identifier: 19790028563}
}