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Duisburg: Atlas Film + AV, [ca. 1991] ; [S.l.]: World Entertainers [Orig.-Prod.], [ca. 1991]
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Wien [u.a.]: Weinberger, c 1958
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[Halle/Saale]: Arthaus Musik, 2008
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[Köln]: Deutschlandradio, [2020]
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JSTOR, 1990
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National Council of Teachers of Mathematics, 1999
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National Council of Teachers of Mathematics, 1999
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Elsevier BV, 2007
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American Association for the Advancement of Science (AAAS), 1971
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American Association for the Advancement of Science, 1971
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National Academy of Sciences, 2010
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Elsevier BV, 2001
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Elsevier BV, 2014
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Springer Science and Business Media LLC, 2024