Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
https://www.biblio.com/book/testament-wright-frank-lloyd/d/1461610750?srsltid=AfmBOop0O_YLy3eauS4g0rsbNE-QmtvPCf5WZukxI-JGDS1dn1DmRF4k