1
Published: Stuttgart : Landtag, 1956-
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2
Published: Köln : Schmidt
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3
Published: Rheinbreitbach : NDV, [2018-2021]
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4
Published: Braunschweig : Archiv Verlag, [2003?]-
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5
6
Published: Bad Nauheim : Podzun
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7
Database
8
Published: München : C.H. Beck
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9
Published: Frankfurt a.M. : Verl. Kommentator
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