Papers on the conservation of mineral resources /  reprinted from Report of the National Conservation Commission, February, 1909. 

 - Washington :  Govt. Print. Off.,  1909. 
 - 214 p. :  xii pl. (part. fold., incl. maps) diagrs. ;  24 cm. 
 - Bulletin 394 .
 - Geological Survey (U.S.).  Bulletin ;  394. .
<br/><br/> Contents.- Coal fields of the United States, by M.R. Campbell and E.W. Parker.- Estimates of future coal production, by H. Gannett.- The petroleum resources of the United States, by D.T. Day.- Natural-gas resources of the United States, by D.T. Day.- Peat resources of the United States, exclusive of Alaska, by C.A. Davis.- Iron ores of the United States, by C.W. Hayes.- Resources of the United States in gold, silver, copper, lead, and zinc, by W. Lindgren.- The phosphate deposits of the United States, by F.B. Van Horn.- Mineral resources of Alaska, by A.H. Brooks.  Includes index. 
<br/><br/><label>LCCN: </label>gs 09000198  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources--United States.
<br/><br/><label>LC Class. No.: </label>QE75  / .B9 no. 394