Perman Roger <br/><br/>
Natural resource and environmental economics 
Perman Roger 
 - London  Longman            1996 
 - xxiii,396p  cm. 
<br/><br/> Bibliography: p 378-88 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>X:271:(G:55), N6/TD1;2/TD3