Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
http://www.studyblue.com/notes/note/n/lecture-2-a-new-direction-authenticity-and-shedding-the-burden-of-style/deck/6181096
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https://www.invent.org/inductees/francois-hennebique
https://www.pinterest.es/pin/551268810617145843/
http://www.cehopu.cedex.es/hormigon/fichas/img_ficha.php?id_img=105#
http://www.engineering-timelines.com/who/Mouchel_LG/mouchelLouisGustave4.asp