@misc{indiciaeab60b32a98e2,
  title = {Semiperiodic variations in CO2 abundance on Venus},
  author = {Barker, E. S. and Perry, M. A.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750056484},
  note = {Source identifier: 19750056484}
}