Sinha R K <br/><br/>
Mineral economics 

 - 4 
 - New Delhi  Oxford & IBH publishing co.    1988 
 - xiv, 394p  cm. 
<br/><br/><label>Standard No.: </label>79434 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>H71, L0;M8         TH