Verma, P S; Agarwal, V K <br/><br/>
Principles of ecology 

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 - S. Chand & Co Ltd  1992 
 - 591 
 - .
<br/><br/>  
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology-- Biodiversity-- Conservation-- Ecosystems
<br/><br/><label>Dewey Class. No.: </label>577  VER-P