Mineral resources development :  hearings, 81st Congress, 1st session, on S. 240, S. 2105, S. 2230, and S. 2320, July 15, 16, 19, 30, and Aug. 5, 1949. 

 - [Washington, D.C.],  1949. 
 - iv, 325 p. :  ill. 
<br/><br/> [The hearing of July 18, 1949, is included].  CRDP Program Historic Shelflist record. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources--United States.
<br/><br/><label>Gov. Doc. Class. No.: </label>Y 4.IN 8/13:M 66