@misc{indiciae68afc431fa17,
  title = {Discovery Venera surface: Atmosphere geochemistry experiments mission concept},
  author = {Surkov, Yuri A. and Head, James W. and Kremnev, Roald and Nock, K. T.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19940016333},
  note = {Source identifier: 19940016333}
}