Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
http://dewiultralight08.files.wordpress.com/2011/03/126812-050-32eda8c0.jpg
http://lowres-picturecabinet.com.s3-eu-west-1.amazonaws.com/38/main/93/454374.jpg
http://www.leamarsh.com/pix/patrick-abercrombie.jpg
https://transnationalarchitecture.group/2014/12/16/current-research-sri-lanka-and-patrick-abercrombie/
https://issuu.com/costos/docs/edici_n_288_-_septiembre_issuu__2_/s/138671