@misc{indiciaee9cf9d3bc6e4,
  title = {Zur chemie der marsoberfläche},
  author = {Klaus Keil and Benton C. Clark and A. K. Baird and Priestley Toulmin and Harry J. Rose},
  year = {1978},
  doi = {10.1007/bf00368561},
  url = {https://pubs.usgs.gov/publication/70012423},
  note = {Source identifier: 70012423}
}