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a standardized card used for record keeping in libraries.
A library card may be a borrower’s card or book card. The book card shows basic information about the book, such as the author, title, volume or issue number, and catalog code; it also includes the borrower’s card number and the date the book is due. The circulation of a book is learned from these records.
The borrower’s card contains brief information about the borrower. When a reader takes books out of the library, the date of issue, identification number, author, and title of each are recorded on his card. These records serve as the basis for determining readers’ interests and aid in organizing the library’s work with specific groups of readers.