@misc{indiciae6d98d18e9450,
  title = {Controlled Ecological Life Support Systems: Natural and Artificial Ecosystems},
  author = {Macelroy, Robert D. and Thompson, Brad G. and Tibbitts, Theodore W. and Volk, Tyler},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19910015430},
  note = {Source identifier: 19910015430}
}