Sankaran Unni, K <br/><br/>
Paristhiti vijnanathinte moola tatvangal 

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 - Trivandrum  State Institute of Languages  1974 
 - 232p.   
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<br/><br/><label>Subjects--Index Terms: </label>Ecology  Environment  Biology  Environment management  Environmental sciences 
<br/><br/><label>Dewey Class. No.: </label>577.4=M