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1.
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The Hague : Kluwer Law International, c1998.
English | U 11 BUE.G |
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2.
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München : Beck, 2000.
6., neubearb. Aufl.
German | B 344 SCH.S |
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3.
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München : C.H. Beck, 1984.
Second edition.
German | N 621 BAP.V |
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4.
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Berlin : De Gruyter, 1976.
Fifth edition.
German | K 8 BUS.W(5) 1976 |
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