Devendra Kumar Tr. <br/><br/>
Vigyan jagat 

 - New Delhi, India  Vigyan Bharti   1995 
 - 188p 
<br/><br/><br/>MACESE 
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science