Ryan W. J. L. <br/><br/>
Price Theory /     
[por]: Ryan, W. J. L.;  
 -  The Economic of Natural Resource Depletion  1977 
 - 399 p  20cm. 
<br/><br/><label>Source: </label>E7625 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Economia ll<br/>Economia