English operator: Panoramio described at URL: https://web.archive.org/web/20161024122106/http://www.panoramio.com/photo/84865685 determination method...
Petogradsky District, St. Petersburg, Russia operator: Panoramio described at URL: https://web.archive.org/web/20161028015816/http://www.panoramio.com/photo/108841339...
English operator: Panoramio described at URL: https://web.archive.org/web/20161028162429/http://www.panoramio.com/photo/91360806...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024164208/http://www.panoramio.com/photo/76780451...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102124221/http://www.panoramio.com/photo/116827602...
English operator: Panoramio described at URL: https://web.archive.org/web/20161025161734/http://www.panoramio.com/photo/76781536...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031085036/http://www.panoramio.com/photo/114405468...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102140335/http://www.panoramio.com/photo/109105628...
English operator: Panoramio described at URL: https://web.archive.org/web/20161028125329/http://www.panoramio.com/photo/109214083...
English operator: Panoramio described at URL: https://web.archive.org/web/20161029202116/http://www.panoramio.com/photo/109214539...
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