1981 worldwide petrochemical directory 
/ A DiVision of Pennwell Publishing Company 
 - 19th ed. 
 - Tulsa:   A Division of Pennwell Publishing Company,   1980 
 - 273p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemical technology
<br/><br/><label>Subjects--Index Terms: </label>Chemical engineering  
<br/><br/><label>Universal Decimal Class. No.: </label>R 665.5(100)(058)   / M0