English operator: Panoramio described at URL: https://web.archive.org/web/20161025011038/http://www.panoramio.com/photo/70674664 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024180408/http://www.panoramio.com/photo/70674593 determination method...
English operator: Panoramio described at URL: https://web.archive.org/web/20161024095542/http://www.panoramio.com/photo/70674627 determination method...
Español: Wiki Loves Monuments 2011:experiencia en España y reflexiones desde la difusión del patrimonio cultural. Digithum, n.º 14 (mayo de 2012) | ISSN 1575-2275...
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