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1.
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New York : McGraw-Hill, c1997.
English | D 80 MIN.I |
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2.
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Ottawa, Ontario : Intellectual Property Institute of Canada, 1996.
English | 4 CA |
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3.
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London [England] : Butterworths, 1997.
English | D 80 NAT.L |
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4.
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Buffalo, New York : The Patent and Trademark Office Society, 1997.
English | 47 US |
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5.
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New York : McGraw-Hill, c1994.
English | D 724 DER.I |
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6.
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[Place of publication not identified] : [publisher not identified], 1995.
English | 19 US |
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