@misc{indiciaebfc56f1e66cd,
  title = {Distribution and Properties of Large Symmetric Knobs on Mars},
  author = {Frey, H. and Middleton, J. and Semeniuk, A. M.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19850015287},
  note = {Source identifier: 19850015287}
}