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

 -  1970 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>49373 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Natural resources<br/>Mineral
<br/><br/><label>Dewey Class. No.: </label>H71, L0;5