V Economics > V.12 Environmental and resource economics > V.12.03 Resource economics > Resource deposit > Petroleum resources

W Economic sectors > W.05 Resource Sector and Mining > Resource deposit > Petroleum resources

N Related subject areas > N.10 Natural sciences and technology > N.10.01 Earth sciences and environment > Resource deposit > Petroleum resources

W Economic sectors > W.05 Resource Sector and Mining > W.05.01 Mining > W.05.01.02 Crude Petroleum and Natural Gas Production > Petroleum resources