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11
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12Article
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13Article
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14
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15Published: Wiesbaden | Harrassowitz | 2005Book
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16Published: Lüneburg | Nordostdeutsches Kulturwerk | 1991Book
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17Published: Wiesbaden | Harrassowitz | 1995Book
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18
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19Published: Lüneburg | Nordostdeutsches Kulturwerk | 1998Book