Kumar, Ravindra <br/><br/>
Vaijnanik anusandhan aur aviskar 

 - Gaziabaad  Vijnan Bharati  2004 
 - 128p. p. 
<br/><br/><label>ISBN: </label>8190155636 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hindi ;Science
<br/><br/><label>Dewey Class. No.: </label>507  / KUM