TY - SER ED - Penn Well Corporation TI - International petroleum encyclopedia SN - 1593700830 SN - 1521-4400 AV - HD 9560.1 .I58 2006 PY - 2006/// CY - Tulsa PB - Penn Well Pub. Co. KW - Petroleum industry KW - Trade KW - Natural gas KW - Oil production N1 - includes index ER -