English operator: Panoramio described at URL: https://web.archive.org/web/20161023213732/http://www.panoramio.com/photo/67102437...
English operator: Panoramio described at URL: https://web.archive.org/web/20161013184329/http://www.panoramio.com/photo/25356042...
English operator: Panoramio described at URL: https://web.archive.org/web/20161017110327/http://www.panoramio.com/photo/43170005...
Panoramio described at URL: https://web.archive.org/web/20161102112802/http://www.panoramio.com/photo/25636433 determination method or standard: SHA-1...
Panoramio described at URL: https://web.archive.org/web/20161011001735/http://www.panoramio.com/photo/2148975 determination method or standard: SHA-1...