English operator: Panoramio described at URL: https://web.archive.org/web/20161031000431/http://www.panoramio.com/photo/127617274...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024014758/http://www.panoramio.com/photo/57111502...
English operator: Panoramio described at URL: https://web.archive.org/web/20161020035857/http://www.panoramio.com/photo/54708920...
English operator: Panoramio described at URL: https://web.archive.org/web/20161020130754/http://www.panoramio.com/photo/54708943 determination method...
archive.org/web/20161021101845/http://www.panoramio.com/user/969909?with_photo_id=50477076 operator: Panoramio described at URL: https://web.archive...
panoramio.com/user/543460?with_photo_id=6232617 operator: Panoramio described at URL: https://web.archive.org/web/20161010124443/http://www.panoramio...
archive.org/web/20161026234742/http://www.panoramio.com/user/1275365?with_photo_id=82503100 operator: Panoramio described at URL: https://web.archive...
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