... > V Economics > V.12 Environmental and resource economics > V.12.02 Energy economics > Energy sector > Gas industry > Natural gas production

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... > W Economic sectors > W.04 Energy and Water Industries > W.04.01 Energy sector > Energy sector > Gas industry > Natural gas production

W Economic sectors > W.04 Energy and Water Industries > W.04.01 Energy sector > Gas industry > Natural gas production

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