Rai, Amar Nath. <br/><br/>
Distance education :  open learning vs. virtual university concepts / 
Amar Nath Rai. 
 - [S.l.] :  Authors Press,  2000. 
 - 1 v. (unpaged) 
<br/><br/> Hardcover. 
<br/><br/><label>ISBN: </label>8172730365 9788172730369