U S sources of petroleum and natural gas statistics  

 - New York:   Special Libraries Association,   1909 
 - vii, 91p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum 
<br/><br/><label>Subjects--Index Terms: </label>Statistics 
<br/><br/><label>Universal Decimal Class. No.: </label>R 553.98(-82)(73)  / K1