@misc{indiciae2c58af26f394,
  title = {Source gases: Concentrations, emissions, and trends},
  author = {Fraser, Paul J. and Harriss, Robert and Penkett, Stuart A. and Makide, Yoshihiro and Sanhueza, Eugenio and Alyea, Fred N. and Rowland, F. Sherwood and Blake, Don and Sasaki, Toru and Cunnold, Derek M.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19930001900},
  note = {Source identifier: 19930001900}
}