Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
http://www.nps.gov/nr/travel/detroit/d26.htm
http://www.counter-currents.com/2012/09/ralph-adams-cram-wild-boy-of-american-architecture/
http://satucket.com/lectionary/cram_upjohn_lafarge.htm