Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
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http://www.ernst-scheidegger-archiv.org/slir/w700-h700/files/vantongerloo_1.jpg
http://www.ernst-scheidegger-archiv.org/slir/w700-h700/files/vantongerloo_farbig_1.jpg