Something strange is going on in your library's reference section. As you read these words, key reference materials are evolving -- and not simply as digital versions of the books you have relied on for years. Instead, a new species of online resource is quietly emerging to supplement or even replace printed reference classics. Such "online reference books" aren't books at all. They are intricate text-and-image databases that harness the power of the Interent to deliver information in profoundly new ways.
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