Also, as publishers re-package and re-print public domain books, these also are considered separate products with new ISBNs and new dates.

同样，如果出版商重新包装以及重新印刷了公有领域的图书，而且如果它们带有新的ISBN号以及新的出版日期，我们也把它们看作不同的产品。

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It automatically checks ISSNs and ISBNs found in web page references against the catalog and connects journal references to the library's link resolver.

自动检查在书目信息页面中找到ISSNs和ISBNs，并且把期刊信息连接到图书馆链接解析器。

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These keys can be a concatenation of multiple columns, and often identifiers like Social Security Numbers, employee IDs, ISBNs, or part IDs are used in these roles.

这些键可以是多个列的并置，通常象“社会保障号”、雇员标识、ISBN或部件标识这样的标识用于这些角色中。

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Bowker counted over 235, 000 titles self-published in print and digital compared to 148, 424 titles in 2011, although it counts only those books with ISBNs.

FORBES: Self-Publishing Shows Rapid Growth