Singh , Akhand Pratap  <br/><br/>
Pramukh Bhoutik Vaigyanik aur Unke Aavishkar / 
by Akhand Pratap Singh 
 - New Delhi :  Prasanta Distributor  ,   2014. 
 - 151 p.  ill. ;  22 c.m. 
<br/><br/><label>ISBN: </label>9789383963133 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hindi Collection 
<br/><br/><label>Dewey Class. No.: </label>530.0922  / SIN / P