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Improvements in or relating to Works of Reference, Text Books, and the like.
Improvements in or relating to Works of Reference, Text Books, and the like.
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机译:参考书目,教科书等方面的改进。
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126,851. Marcus, H. June 28, 1918. Book-markers.-Book-markers made of transparent paper bear numbered labels which protrude beyond the edges of the leaves of the book.
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