== source == 

  
 *Title 	 Bitumen and petroleum in antiquity 
 *Author 	 Robert James Forbes 
 *Publisher 	 E.J. Brill, 1936 
 *Original from 	 the University of Michigan 
 *Digitized 	 Dec 12, 2008 
 *Length 	 109 pages 
 *Subjects 	  
 #Bitumen 
 #Greek fire 
 #Petroleum 
 #Science, Ancient 
 :some one with time could check this out and really improve the article