Trivedi, P.R. <br/><br/>
Natural environment and constitution of India 
P.R. Trivedi, Pirenlal Sharma and; K.N. Sudarshan. 
 - 3rd ed. 
 - New Delhi  Ashish Publishing  1994 
 - vii,491p., 22cm. 
<br/><br/><label>Dewey Class. No.: </label>344.046026854  / T79N