International Energy Agency, Organisation for Economic Co-operation and Development, & ProQuest (Firm). (2009). Natural gas information (2009 ed.). OECD : International Energy Agency.
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Chicago-čujuhus (17. p.)
International Energy Agency, Organisation for Economic Co-operation and Development, juo ProQuest (Firm). Natural Gas Information. 2009 ed. Paris: OECD : International Energy Agency, 2009.
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MLA-čujuhus (9. p.)
International Energy Agency, et al. Natural Gas Information. 2009 ed. OECD : International Energy Agency, 2009.
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