@misc{indiciae118f9ffeb644,
  title = {Argon content of the Martian atmosphere at the Viking 1 landing site: Analysis by x-ray fluorescence spectroscopy},
  author = {B. C. Clark and P. Toulmin and A. K. Baird and Klaus Keil and H. J. Rose},
  year = {1976},
  doi = {10.1126/science.193.4255.804},
  url = {https://pubs.usgs.gov/publication/70011001},
  note = {Source identifier: 70011001}
}