Annual report / 
West Bengal Pollution Control Board 
 - Calcutta :  The Board,  1998- 
 - v. :   charts. col. ill.;  27cm [7], 262 p. ;  col.ill. ; charts. ;   28 cm. 
 - Annual :  1997-- 
 - 1997-98-- 2022-2023 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution Control Industry--West Bengal
<br/><br/><label>Dewey Class. No.: </label>628.5 (5415)