Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
INTERNET http://www.modernism101.com/giedion_gropius_1954.php
INTERNET http://www.amazon.es/Walter-Gropius-Dover-Books-Architecture/dp/0486271188
INTERNET http://www.alibris.com/booksearch.detail?invid=9495936333&browse=1&qwork=7114928&qsort=&page=1