@misc{indiciae0f8f7720e5c7,
  title = {Classification of Circular Features on Venus},
  author = {Stofan, E. R. and Head, J. W. and Grieve, R. A. F.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19850015200},
  note = {Source identifier: 19850015200}
}