Manivasakam N. <br/><br/>
Environmental pollution 

 - New Delhi, India  National Book Trust  1992 
 - viii,146p 
<br/><br/><label>ISBN: </label>81-237-0102-0 
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Education