Singh, H.S.  . <br/><br/>
Principles of environmental conservation /  
H.S.Singh. 
 - Dehradun :   International Book Distributors ,   1989. 
 - vi,273p. :   ill.maps.charts ;   21cm .  
<br/><br/>Includes bibliographical referenes 
<br/><br/><label>ISBN: </label>8770891019  Rs 75.00 
<br/><br/><label>Subjects--Index Terms: </label>CONSERVATION OF NATURAL RESOURCES 
<br/><br/><label>Dewey Class. No.: </label>577  / SIN/P