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   Tumbleweeds: The problem of Empty Discussion Spaces<br/>
Unrefereed Book Chapter. 
Nov 16, 2006.  
<em>The University in the Information Age</em>, (Never seen, might not exist) , Universidad Inca Garcilaso de la Vega  
[<a  href="http://www.downes.ca/post/38586">Full Text</a>]
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