Roy,  Subrat. <br/><br/>
Environmental science (gujarati) 

 - New Delhi :  Khanna Pub,  2021. 
 - 96 
<br/><br/><label>ISBN: </label>9789355380838 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemical Engineering, 
<br/><br/><label>Dewey Class. No.: </label>628  / ROY