Agrahari, Ravi P. <br/><br/>
Science and technology (Fifth edition)  for civil services preliminary and main examinations  
by Ravi P Agrahari  
 - Chennai  McGraw hill Education   2022 
 - v.p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science and Technology <br/>Science and state
<br/><br/><label>Dewey Class. No.: </label>PKP YA3 Ag81