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Bremerhaven: Wirtschaftsverl. NW, Verl. für neue Wissenschaft, 1996
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Düsseldorf: Patmos-Verl., 1975
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2020
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Luxembourg: Publications Office, 2017
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Luxembourg: Publications Office, 2016
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Luxembourg: Publications Office, 2016
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Luxembourg: Publications Office, 2018
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Luxembourg: Publications Office, 2018
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Luxembourg: Publications Office, 2017
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Luxembourg: Publications Office, 2016
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Luxembourg: Publications Office, 2016
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Luxembourg: Publications Office, 2016
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Luxembourg: Publications Office, 2016
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Luxembourg: Publications Office, 2016
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Luxembourg: Publications Office, 2015
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Luxembourg: Publications Office, 2013
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Luxembourg: Publications Office, 2017
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Luxembourg: Publications Office, 2013
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Luxembourg: Publications Office, 2013
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Luxembourg: Publications Office, 2018