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1von: Laboor, Ernst[2022], Reprint 2022, De Gruyter
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2von: Laboor, Ernst[2022], Reprint 2021, De Gruyter
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3von: Badstübner, Rolf[2021], Reprint 2021, De Gruyter
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4von: Bock et al., Sigrid[1987], Reprint 2024, De Gruyter
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5von: Feyl, Othmar2022, Reprint 2021, De Gruyter
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6