1.
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Berlin : Springer Verlag, 1984.
English | B 341 OEL.D |
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2.
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Munich : Max Planck Institute for Foreign and International Patent, Copyright, and Competition Law, c1986.
English | N 631 LAD.P |
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3.
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Berlin : Springer, 2004.
German | N 637 HAH.T |
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4.
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Leiden : Martinus Nijhoff Publishers, [2008] V. 7.
English | F 35 STO.W |
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