Agrahari, Ravi P <br/><br/>
Science and Technology:   for Civil services preliminary and main examinations/ 
by Ravi. P. Agrahari 
 - 5th edition 
 - NewDelhi  :  Mc Graw Hill   , 2022. 
<br/><br/><label>ISBN: </label>9789354601286 
<br/><br/><label>Dewey Class. No.: </label>371.26 AGR/S