2022-08-31问：Preserved about 300 thousand.
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2022-08-31问：consists of the book itself
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2022-08-31问：books in ancient times was papyrus
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2022-08-31问：works of art.
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2022-08-31问：which is carried out by the printing
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2022-08-31问：Europe, and in Ancient Russia
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2022-08-31问：Since manuscripts are subject to deterioration
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