Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
http://www.libraryweb.org/rochimag/architecture/Architects/Bragdon/Intro.htm
http://gurdjieffclub.com/en/people-of-gurdjieff-s-influence#yakor8
http://manybooks.net/authors/bragdonc.html