| Web Directory Submit - Reference - Encyclopedias |
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| Wikipedia - http://en.wikipedia.org/ A free encyclopedia built collaboratively using Wiki software. (GNU Free Documentation License).- [Details] PR: 8 |
| Stanford Encyclopedia of Philosophy - http://plato.stanford.edu/ Online philosophy reference work, articles are authored and updated by experts in the field. Edited by Edward Zalta.- [Details] PR: 8 |
| Encyclopedia.com from Electric Library - http://www.encyclopedia.com/ Free resource offers more than 50,000 concise articles.- [Details] PR: 7 |
| Symbols.com - http://www.symbols.com/ An encyclopedia of over 2500 symbols. Search by keywords/concepts or by graphical attributes.- [Details] PR: 6 |
| Visual dictionary - http://www.infovisual.info/ Where words are defined as pictures, for learning the exact names of objects. Different from a dictionary or from encyclopedia because the images replace the words.- [Details] PR: 5 |