Kula, Erhun <br/><br/>
Economics of natural resources and the environment 
Erhun Kula 
 - London :  Chapman & Hall,  1992 
 - 287 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0412363305 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Natural resources--Mathematical models<br/>Environmental economics--Mathematical models