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operator: Panoramio described at URL: https://web.archive.org/web/20161113162540/http://www.panoramio.com/photo/41961021 determination method: SHA-1...
Panoramio described at URL: https://web.archive.org/web/20161029232428/http://www.panoramio.com/photo/107338450 determination method or standard: SHA-1...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102063131/http://www.panoramio.com/photo/120781101 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024114851/http://www.panoramio.com/photo/82841824 determination method...
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