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绝版书居多的电子书下载站

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Open Access Library (www.oalib.com) is an academic search engine and publisher. You can download research papers for free and submit your paper to it. It is a shared academic database.

爱悦读网，是一个免费的电子书分享平台，提供kindle、epub、mobi、azw3、pdf、txt等格式电子书，全集全本打包免费下载，爱悦读网是一个值得电子书爱好者收藏的网站

An eBook search engine works on ENS & IPFS.

Library Genesis