@misc{indiciaeb33228538534,
  title = {Value and validity of earth resources observations from space},
  author = {Charles J. Robinove},
  year = {1973},
  doi = {10.1080/02626667309494008},
  url = {https://pubs.usgs.gov/publication/70241799},
  note = {Source identifier: 70241799}
}