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An Introduction to #3DPrinting for #Architecture – by Piet Meijs

http://blog.objet.com/2012/01/26/an-introduction-to-3d-printing-for-architecture-by-piet-meijs/

Image of RepRap Family Tree by @watsdesign on Thingiverse

http://www.thingiverse.com/thing:9088

and Make: blog!

http://blog.makezine.com/archive/2011/06/reprap-family-tree.html