@misc{indiciae173d2b2456ce,
  title = {Io's surface composition - Observational constraints and theoretical considerations},
  author = {Fanale, F. P. and Johnson, T. V. and Matson, D. L.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770063036},
  note = {Source identifier: 19770063036}
}