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Weinheim [u.a.]: Beltz, 1974
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Stuttgart; Leipzig [u.a.]: Klett, 19XX-
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Stockholm: SÖ-förlaget/Skolöverstyrelsen, 1967 ; Online-Ausgabe, Braunschweig: Georg-Eckert-Institut - Leibniz-Institut für internationale Schulbuchforschung, 2020
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Informa UK Limited, 1970
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SAGE Publications, 1968
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Informa UK Limited, 1958
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Informa UK Limited, 1965
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JSTOR, 1976
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Springer Science and Business Media LLC, 1976
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JSTOR, 1978
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Springer Science and Business Media LLC, 1965
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Springer Science and Business Media LLC, 1964
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Springer Science and Business Media LLC, 1963