Stephen, M <br/><br/>
Prakritisomrakshanavum silentvaliyum (m) / 
Stephen, M 
 -  Science & Society Study Group, TVPM,  1980 
 - p. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental problems & services; Social problems & services
<br/><br/><label>Dewey Class. No.: </label>363.7 STE-P