@misc{indiciae989acb18c8e7,
  title = {Venus - Topography revealed by radar data.},
  author = {Campbell, D. B. and Dyce, R. B. and Ingalls, R. P. and Pettengill, G. H. and Shapiro, I. I.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720035686},
  note = {Source identifier: 19720035686}
}