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Panoramio described at URL: https://web.archive.org/web/20161013012856/http://www.panoramio.com/photo/11582823 determination method or standard: SHA-1...
Panoramio described at URL: https://web.archive.org/web/20161030132127/http://www.panoramio.com/photo/92648062 determination method or standard: SHA-1...
Panoramio described at URL: https://web.archive.org/web/20161012043437/http://www.panoramio.com/photo/13378605 determination method or standard: SHA-1...
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English operator: Panoramio described at URL: https://web.archive.org/web/20161027171422/http://www.panoramio.com/photo/98751754 determination method...
pdf Català: Wiki Loves Monuments 2011: experiència a Espanya i reflexions des de la difusió del patrimoni cultural. Article a Digithum, núm. 14...
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