Adegan Directory » Reference » Encyclopedias
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| Bartleby.com - http://www.bartleby.com/ Publishes thousands of free online classics of reference, literature and nonfiction. |
| Probert Encyclopaedia - http://www.probertencyclopaedia.com/ One of the World Wide Web's longest running, largest and most celebrated independent encyclopaedias famed for its originality, reliability and integrity. |