archive.org/web/20161023141609/http://www.panoramio.com/user/662063?with_photo_id=63175059 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161016221934/http://www.panoramio.com/user/4331390?with_photo_id=46760264 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161020085101/http://www.panoramio.com/user/3451733?with_photo_id=62107340 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161015045808/http://www.panoramio.com/user/801668?with_photo_id=38433874 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161023030044/http://www.panoramio.com/user/2159640?with_photo_id=62266943 operator: Panoramio described at URL: https://web.archive...
English operator: Panoramio described at URL: https://web.archive.org/web/20161025054258/http://www.panoramio.com/photo/80929277 determination method...
archive.org/web/20161031132742/http://www.panoramio.com/user/2314684?with_photo_id=124923777 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161028184704/http://www.panoramio.com/user/2337071?with_photo_id=90519937 operator: Panoramio described at URL: https://web.archive...
original. https://creativecommons.org/licenses/by-sa/4.0CC BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue English URL: https://commons.wikimedia...
original. https://creativecommons.org/licenses/by-sa/4.0CC BY-SA 4.0 Creative Commons Attribution-Share Alike 4.0 truetrue English Slides used for the Feb 27...
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