Organisation for Economic Co-operation and Development. Working Party on Environmental Performance, ProQuest (Firm), & Omersu, G. (2012). Deutschland 2012. OECD.
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Chicago-čujuhus (17. p.)
Organisation for Economic Co-operation and Development. Working Party on Environmental Performance, ProQuest (Firm), juo Gerhard Omersu. Deutschland 2012. [Paris]: OECD, 2012.
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MLA-čujuhus (9. p.)
Organisation for Economic Co-operation and Development. Working Party on Environmental Performance, et al. Deutschland 2012. OECD, 2012.
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