Groups and Networks Video Originale http://j.mp/lY6D8Rhttp://j.mp/lY6D8R Causerie autour de ce theme http://www.youtube.com/watch?v=BML4C_ah3Pc http://www.youtube.com/watch?v=BML4C_ah3Pc http://www.flickr.com/photos/stephen_downes/252157734/
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