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into other languages should contact the current chair of the RBMS Publications Committee.

The appendix lists online and print resources for more information on the questions covered.

Millions of books, pamphlets, magazines, newspapers, and broadsides have been published since the invention of printing more than five hundred years ago.

Only a small portion of these pieces, however, would be considered “rare” by specialists.

In simple terms, books achieve a degree of rarity only when demand exceeds supply.

For information about how many copies are held by libraries, your local librarian can help you access databases such as OCLC’s World Cat.

Regardless of scarcity, a book without important text or distinguishing physical characteristics is likely to have little market value.Age by itself is not enough to make a book valuable.The importance of the text, the condition of the book, and demand for it will determine the valuation of an old book.Unfortunately, there are no easy formulas for determining rarity.People value books either because of their contents or because of their physical characteristics.First editions of important literary or historical works and initial reports of scientific discoveries or inventions are prime examples of books that are important because of their contents.