Colby, Donald S. <br/><br/>
Mineral resource valuation for public policy / 
by ... and David B. Brooks 
 - Washington :  U.S. Bureau of Mines, Department of the Interior,  1969 
 - 34 p. 
 - Information circular ;  no. 8422 .
 - United States.  Bureau of Mines.  Information circular ;  no. 8422 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources--United States
<br/><br/><label>LC Class. No.: </label>TN295  / U4 no. 8422