Panoramio described at URL: https://web.archive.org/web/20161031035731/http://www.panoramio.com/photo/113630978 determination method or standard: SHA-1...
Panoramio described at URL: https://web.archive.org/web/20161023161828/http://www.panoramio.com/photo/63206248 determination method or standard: SHA-1...
Panoramio described at URL: https://web.archive.org/web/20161102082905/http://www.panoramio.com/photo/113630810 determination method or standard: SHA-1...
English operator: Panoramio described at URL: https://web.archive.org/web/20161029132636/http://www.panoramio.com/photo/98078916 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161016170949/http://www.panoramio.com/photo/48118106 determination method...
