Search Results       Your search for [subject]Petroleum industry and trade -- United States -- Mathematical models returned 1 record.           Petroleum discoveries and government policy : an econometric study of supply. by Epple, Dennis N.; Cambridge, Mass.: Ballinger Pub. Co., 1975. Subject: Petroleum industry and trade -- United States -- Mathematical models; Natural gas -- United States -- Mathematical models.          Add to Book Cart Relevance: 32.19%