@misc{indiciae32a73cc2736f,
  title = {Automated Water-Purification System},
  author = {Ahlstrom, Harlow G. and Hames, Peter S. and Menninger, Fredrick J.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19880000544},
  note = {Source identifier: 19880000544}
}