Friday, 21 October 2011
General Systems "Hourglass" or "Grail" Diagrams - a knol by John A. Gowan
http://knol.google.com/k/john-a-gowan/general-systems-hourglass-or-grail/1ketcuksrdrjb/68#
Twitter: @wuhlax
Imaginary Foundation
http://www.blog.imaginaryfoundation.com/blog/page/24
Twitter: @wuhlax
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