Links:
[1] http://www.coac.arquitectes.cat/en/content/coac-archive-and-library-are-collaborating-exhibition-%E2%80%98barcelona-metropolis-age-photography
[2] http://ajuntament.barcelona.cat/lavirreina/ca/exposicions/barcelona-la-metropoli-en-lera-de-la-fotografia-1860-2004
[3] http://www.coac.arquitectes.cat/en/javascript%3Ahistory.back%281%29