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21Published: Marburg | Herder-Inst. | 2001Book
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22
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23Published: Bonn | Hochschulrektorenkonferenz | 1994Book
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24Published: Marburg | Herder-Inst. | 2004Book
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25
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26Published: Marburg | Herder-Inst. | 1997Book
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27Published: Bad Honnef | Bock Verl. | 1993Book
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28Published: Köln ; Weimar ; Wien | Böhlau Verlag | 2017Book
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29Published: Bad Honnef | Bock | 1995Book
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30Published: Toruń | Towarzystwo Naukowe ; Deutsches Historisches Institut Warschau [u.a.] | 2012Book