Mathur, Ladli Mohan <br/><br/>
Planning Producing and Presenting Inexpensive Instructional Materals and Devices 

 - New Delhi  Indian National Teaching Aids Research & Servics  1978 
 - 234 
<br/><br/><label>Subjects--Personal Names: </label> Pure Science 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pure Science