Agrahari, Ravi p. <br/><br/>
Science and technology: for civil services preliminary and main examinations/ 
Ravi  P Agrahari 
 - 5th ed. 
 - Chennai:  Mc Graw Hill,  2022. 
 - xii, various p. 
<br/><br/>1. Science and technology in India<br/>2. Space technology<br/>3. Communication and information technology<br/>4. Defence technology<br/>5. universe and Particle Physics<br/>6. Biotechnology 
<br/><br/><label>ISBN: </label>9789354601286 
<br/><br/><label>Dewey Class. No.: </label>351.076  / AGR/S