@misc{indiciaef0b1dfcfd6a6,
  title = {Advanced air revitalization system testing},
  author = {Heppner, D. B. and Hallick, T. M. and Schubert, F. H.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19840009787},
  note = {Source identifier: 19840009787}
}