Sharma, Shyam Sunder <br/><br/>
51 Vigyan prayog 

 - New Delhi  Vidya Vihar  2005 
 - 140p. p. 
<br/><br/><label>ISBN: </label>818582895-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hindi ;Chidren's Book ;Science Projects
<br/><br/><label>Dewey Class. No.: </label>507.8  / SHA