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Luzern: Räbe, [1955]
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Wien: Naturhistorisches Museum [u.a.], 1980
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Washington, DC: U.S. Energy Information Administration, 2020
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Washington, D.C: Energy Information Administration, September 24, 2021
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Washington, D.C: Energy Information Administration, May 2020
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Washington, D.C: Energy Information Administration, january 7, 2019
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Washington, D.C: Energy Information Administration, August 28, 2023
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Hannover: BGR, 2012
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Washington, DC: U.S. Energy Information Administration, 2013
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Washington, DC: U.S. Energy Information Administration, 2013
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Washington, D.C: Energy Information Administration, May 30, 2024
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Washington, D.C: Energy Information Administration, july 20, 2023
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Basel: MDPI - Multidisciplinary Digital Publishing Institute, 2022