Paristhithidarsanam / 
edited by Thayat Prathapan 
 - Kozhikode :  Haritham Books,  2008,  2018.  2019. 
<br/><br/><br/>In Malayalam 
<br/><br/><label>ISBN: </label>9788192829746 
<br/><br/><label>Subjects--Index Terms: </label>Environmentalism