2023-08-20问：consists of the book itself
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2023-08-20问：so expensive material
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2023-08-20问：Duke de Montosier
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2023-08-20问：Duke de Montosier
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2023-08-20问：mostly in monasteries.
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2023-08-20问：By the end of the 15th century, 35
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2023-08-19问：the spread of parchment.
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