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1.
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Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1987.
German | 29 DE |
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2.
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Deutschland, GmbH : Carl Heymann, [1984]
German | G 941 BEI.E (2014) |
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3.
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Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1979.
German | 29 DE |
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4.
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[Heidelberg, Germany] : [Springer], 1978.
English | 34 DE |
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5.
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Amsterdam Et Al : Elsevier Science Publishers B.v., 1983.
English | E 31 BAL.W |
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6.
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Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1977.
German | 29 DE |
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