Singh, Sheelwant  <br/><br/>
NCERT:  General science and science & technology / 
Sheelwant Singh 
 - 2nd 
 - Chennai:  Mc Graw Hill,   2020. 
 - BI.140 p. 
<br/><br/><label>ISBN: </label>9789389949100 
<br/><br/><label>Dewey Class. No.: </label>351.076  / SIN