Roy, B <br/><br/>
NTA CSIR-UGC( NET) JRF/Lecturership Chemical Sciences (Chemistry) / 
B Roy and M Gagan 
 - New Delhi:  Danika Publishing company,  2023. 
 - 312p 
<br/><br/><label>ISBN: </label>9788189301033 
<br/><br/><label>Dewey Class. No.: </label>540  / ROY/U