Book data

Contains 'book_data.json' A JSON-encoded list of records, consisting of bibliographic information about the digitised works as well as technical information about the identifier's of extracted images on Flickr and identifier's for the PDF versions.本数据集包含`book_data.json`文件，该文件内含经JSON编码的记录集合，涵盖数字化作品的文献著录信息，以及Flickr平台上提取图像的标识符与PDF版本标识符的相关技术信息。