West Bengal, Board of Secondary Education <br/><br/>
Environmental studies : class IX 

 - Kolkata  West Bengal Board of Secondary Education  2005 
 - x, 69p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Life science, Environmental studies, Ecology - textbook
<br/><br/><label>Dewey Class. No.: </label>372.357 WES(TB)