Panoramio described at URL: https://web.archive.org/web/20161021123936/http://www.panoramio.com/photo/64817948 determination method or standard: SHA-1...
Panoramio described at URL: https://web.archive.org/web/20161103015659/http://www.panoramio.com/photo/107446035 determination method or standard: SHA-1...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101154900/http://www.panoramio.com/photo/119908828 determination method...
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