English operator: Panoramio described at URL: https://web.archive.org/web/20161014221045/http://www.panoramio.com/photo/39991301 determination method...
English of: Railway Bridge over Daugava in Riga operator: Panoramio described at URL: https://web.archive.org/web/20161012105529/http://www.panoramio.com/photo/13407268...
English operator: Panoramio described at URL: https://web.archive.org/web/20161015051950/http://www.panoramio.com/photo/39991410...
English operator: Panoramio described at URL: https://web.archive.org/web/20161020092036/http://www.panoramio.com/photo/63123737...
English operator: Panoramio described at URL: https://web.archive.org/web/20161027091504/http://www.panoramio.com/photo/73319967...
archive.org/web/20161025073135/http://www.panoramio.com/user/2738746?with_photo_id=75638670 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161023002155/http://www.panoramio.com/user/5406168?with_photo_id=63123749 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161023001340/http://www.panoramio.com/user/6686724?with_photo_id=68829743 operator: Panoramio described at URL: https://web.archive...
panoramio.com/user/12239?with_photo_id=49058750 operator: Panoramio described at URL: https://web.archive.org/web/20161017173236/http://www.panoramio...
archive.org/web/20161025221135/http://www.panoramio.com/user/1038849?with_photo_id=84029590 operator: Panoramio described at URL: https://web.archive...
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