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1.
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Ottawa, Ontario : Intellectual Property Institute of Canada, 1987.
English | 4 CA |
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2.
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[Washington D.C, USA] : [Bureau of National Affairs (BNA)], [1974-].
English | 13 US |
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3.
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London : Sweet & Maxwell, 2002.
English | H 441 MUS.C |
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4.
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München [Germany] : Mitteilungen der deutschen Patentanwälte, 1983.
German | 43 DE |
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