@misc{indiciaedc25bb116bff,
  title = {Monitoring of catalyst performance in CO2 lasers using frequency modulation spectroscopy with diode lasers},
  author = {Wang, Liang-Guo and Sachse, Glen},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900015298},
  note = {Source identifier: 19900015298}
}