International petroleum encyclopedia 
editor : George Weber 
 - Tulsa, Okla  Petroleum Pub. Co  1968 
 - 424 p. ; ill. ; 30 cm. 
<br/><br/><label>ISBN: </label>0878140034 
<br/><br/><label>LCCN: </label>78-132865 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Petroleum industry and trade<br/>Petroleum industry and trade--Direct