@misc{indiciae4af7bc9dd28a,
  title = {Two major dust storms, one Mars year apart - Comparison from Viking data},
  author = {Ryan, J. A. and Sharman, R. D.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810050571},
  note = {Source identifier: 19810050571}
}