Singh, Y.K <br/><br/>
Encyclopaedia of education technology 
by/ Dr. Y.K.Singh and T.K.Sharma 
 - New Delhi  APH Publishing Orporation  2008 
 - vi, 332p. :  ill. ;  22 cm 
<br/><br/><label>ISBN: </label>9788131303559 
<br/><br/><label>Source: </label>B-29997 
<br/><br/><label>Subjects--Topical Terms: </label>