The international handbook of virtual learning  environments. Vol. 1 
<label>;</label> [et al] <label>;</label> Weiss, Joel 
 - Dordrecht  Springer  2006 
 - xxxv, 870 p. 
<br/><br/>PR 
<br/><br/><label>ISBN: </label>140203802X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education-Computer network resources<br/>Internet in education<br/>Virtual  reality in education
<br/><br/><label>Dewey Class. No.: </label>371.334  / INT