@misc{indiciae073121c5a6eb,
  title = {Reference NO2 calibration system for ground-based intercomparisons during NASA's GTE/CITE 2 mission},
  author = {Fried, Alan and Nunnermacker, Linda and Cadoff, Barry and Sams, Robert and Yates, Nathan},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900053200},
  note = {Source identifier: 19900053200}
}