This general reference tool is a researcher’s dream. The name — xrefer — alludes to the fact that dozens of reference books are cross-referenced in a giant database. So rather than searching reference sources one by one, you can simultaneously search encyclopedias, dictionaries, thesauri and books of quotations, plus a range of subject-specific titles covering everything from art to accountancy and literature to law. The site is free; advanced features (targeted to librarians) are available for a fee. [WDFM Annotation]
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