Verma, P S <br/><br/>
Environmental Biology 

 - New Delhi  S.Chand and Company 
<br/><br/><label>Subjects--Uniform Titles: </label>--GENERAL STACK
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Ecology--Life sciences; biology
<br/><br/><label>Dewey Class. No.: </label>577  / VER-E