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1.
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Köln : C. Heymann, c1997.
Fourth edition.
German | F 67 PAG.L |
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2.
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Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | F 43(121) DE 28 |
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|
3.
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[Place of publication not identified] : [publisher not identified], 1991.
German | N 44(254) DE 29 |
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4.
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München : Beck, c1993.
German | G 62 PFA.I |
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5.
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Köln : Heymanns, c2002.
German | T 23 FOL.T |
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6.
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Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | 28 DE |
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