English operator: Panoramio described at URL: https://web.archive.org/web/20161030040912/http://www.panoramio.com/photo/109905292...
English Nessebar, Bulgaria. operator: Panoramio described at URL: https://web.archive.org/web/20161101085235/http://www.panoramio.com/photo/122206510...
archive.org/web/20161016153818/http://www.panoramio.com/user/3879746?with_photo_id=42849217 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161024110019/http://www.panoramio.com/user/4499131?with_photo_id=76153349 operator: Panoramio described at URL: https://web.archive...
English operator: Panoramio described at URL: https://web.archive.org/web/20161010125219/http://www.panoramio.com/photo/5614253...
English operator: Panoramio described at URL: https://web.archive.org/web/20161102175152/http://www.panoramio.com/photo/109905336...
English operator: Panoramio described at URL: https://web.archive.org/web/20161027173915/http://www.panoramio.com/photo/109905320...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031093724/http://www.panoramio.com/photo/122140877...
English operator: Panoramio described at URL: https://web.archive.org/web/20161030235914/http://www.panoramio.com/photo/124642881...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101100001/http://www.panoramio.com/photo/122206506 determination method...