Panoramio described at URL: https://web.archive.org/web/20161021135534/http://www.panoramio.com/photo/52828369 determination method or standard: SHA-1...
Panoramio described at URL: https://web.archive.org/web/20161017202003/http://www.panoramio.com/photo/49162488 determination method or standard: SHA-1...
Panoramio described at URL: https://web.archive.org/web/20161016193519/http://www.panoramio.com/photo/49162501 determination method or standard: SHA-1...