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Frankfurt am Main: Lembeck, 1982
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Unkel/Rhein; Bad Honnef: Horlemann, 1995 ; Leinfelden-Echterdingen: Fachstelle für Ferntourismus des ZEB, 1995
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Singapore: Christian Conference of Asia, 1980
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Singapore: Christian Conference of Asia, 1975
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Geneva: World Council of Churches, 1981
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[S.l.]: SSRN, 2015
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MDPI AG, 2015
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Elsevier BV, 1980
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Copernicus GmbH, 2019
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American Geophysical Union (AGU), 2018
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American Geophysical Union (AGU), 2024
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Springer Science and Business Media LLC, 2016
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The National Council of Teachers of Mathematics, 1988
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National Council of Teachers of Mathematics, 1988
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Wiley, 2019
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Wiley, 2022
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American Medical Association (AMA), 2022
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American Association for the Advancement of Science (AAAS), 2006
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American Association for the Advancement of Science, 2006
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Oxford University Press (OUP), 2024