Stahl, Gerry. <br/><br/>
Group cognition :  computer support for building collaborative kno wledge / 
Gerry Stahl. 
 - Cambridge :  The MIT Press,  2006. 
 - viii, 510 p. :  ill. ;  24 cm. 
 - Acting with technology. .
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0262195399 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computer assisted instruction.<br/>Computer networks.
<br/><br/><label>Dewey Class. No.: </label>371.334