English operator: Panoramio described at URL: https://web.archive.org/web/20161020090343/http://www.panoramio.com/photo/57982566...
English Nessebar, Bulgaria. operator: Panoramio described at URL: https://web.archive.org/web/20161101085235/http://www.panoramio.com/photo/122206510...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101113139/http://www.panoramio.com/photo/122017625...
archive.org/web/20161031043635/http://www.panoramio.com/user/1275365?with_photo_id=121956772 operator: Panoramio described at URL: https://web.archive...
English operator: Panoramio described at URL: https://web.archive.org/web/20161026024004/http://www.panoramio.com/photo/74742121...
English operator: Panoramio described at URL: https://web.archive.org/web/20161019232434/http://www.panoramio.com/photo/57961004...
English operator: Panoramio described at URL: https://web.archive.org/web/20161023033429/http://www.panoramio.com/photo/57961067...
English operator: Panoramio described at URL: https://web.archive.org/web/20161023180615/http://www.panoramio.com/photo/57961088...
English operator: Panoramio described at URL: https://web.archive.org/web/20161101100001/http://www.panoramio.com/photo/122206506 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161031062255/http://www.panoramio.com/photo/122206521...