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西文图书1.International patent classification. 3rd ed. T-18/I61=3
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可借复本:6 World Intellectual Property Organization.
World Intellectual Property Organization ; 1984.
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西文图书2.International classification of goods and services for the purposes of the registration of marks und F760.2/I61=5
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可借复本:1 World Intellectual Property Organization.
World Intellectual Property Organization, 1987.
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西文图书3.Official catchword index to the fourth edition (1984) of the International patent classification / G255.53-7/O32=4
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C. Heymann, c1984.
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西文图书4.Official catchword index to the third edition (1979) of the International patent classification / N18/W927
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可借复本:0 World Intellectual Property Organization.
The Organization, c1979.
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