English operator: Panoramio described at URL: https://web.archive.org/web/20161031132814/http://www.panoramio.com/photo/111876017 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101221857/http://www.panoramio.com/photo/111877637...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031183148/http://www.panoramio.com/photo/111876082...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031095345/http://www.panoramio.com/photo/111876091...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102003644/http://www.panoramio.com/photo/111875919...
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