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DICTIONARYDICTIONARY

The American Heritage Dictionary of the English Language - Fourth Edition. Dictionary is an alphabetical list of words that tells you what each word means, how to say the word and where the word comes from.
ENCYCLOPEDIAENCYCLOPEDIA

Columbia University Press. Encyclopedia is a collection of articles about a lot of different topics.Columbia Electronic Encyclopedia contains almost 52000 entries with more than 84000 hypertext cross-references.
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