Sahoo, P K. <br/><br/>
Open learning system / 
by P K Sahoo. 
 - New Delhi :  Uppal publishing house,  1994. 
 - 316p. 
<br/><br/><label>ISBN: </label>8185565465 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Open learning system.
<br/><br/><label>Dewey Class. No.: </label>378.03  / SAH.O