panoramio.com/user/34059?with_photo_id=190265 operator: Panoramio described at URL: https://web.archive.org/web/20161010032723/http://www.panoramio.com/photo/190265...
archive.org/web/20161021194227/http://www.panoramio.com/user/4062248?with_photo_id=67364307 operator: Panoramio described at URL: https://web.archive...
31 May 2012 Source http://digithum.uoc.edu/ojs/index.php/digithum/article/view/n14-rodriguez-gonzalez-sierra-navarro-saorin Author Emilio José Rodríguez...
panoramio.com/user/34059?with_photo_id=190256 operator: Panoramio described at URL: https://web.archive.org/web/20161013020455/http://www.panoramio.com/photo/190256...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024132450/http://www.panoramio.com/photo/74487653...
archive.org/web/20161014220210/http://www.panoramio.com/user/1949848?with_photo_id=36255635 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161026180857/http://www.panoramio.com/user/596286?with_photo_id=78295305 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161025030508/http://www.panoramio.com/user/596286?with_photo_id=78295314 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161015184852/http://www.panoramio.com/user/3618423?with_photo_id=31784630 operator: Panoramio described at URL: https://web.archive...
archive.org/web/20161015095547/http://www.panoramio.com/user/3618423?with_photo_id=31784648 operator: Panoramio described at URL: https://web.archive...
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