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1Subjects: “…[Arbeitszeit, 1. Mai]…”
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9Subjects: “…[Arbeitszeit, 1. Mai, SPS]…”
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18Subjects: “…[Arbeitszeit, 1. Mai, Ferien, Jugendbewegung, Europa;Schweiz;Zürich, Kanton;Zürich, Stadt]…”
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