- Access Place Library
http://www.accessplace.com/library.htm
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Literature, authors, biographies, dictionaries, almanacs, encyclopedias, maps, quotes, history, education, government, military, legal, locator tools.
- Wikinfo
http://www.wikinfo.org/
User edited encyclopedia based on Wiki software. Contains articles, information on editing, and a list of differences between this encyclopedia and Wikipedia.
- World Book Encyclopedia
http://www.worldbookonline.com/
Online version of the complete reference work along with dictionary, atlas, links, magazines, historical documents, audio, video, images, and 3D photographs. Requires free temporary registration with option to buy continued access.
- The Satellite Encyclopedia
http://www.TBS-satellite.com/tse/online/
The Satellite Encyclopedia contains fact sheets with basic information such as launch date, country of origin, official identification, and payload description (EIRP maps). Extended launch vehicle section. Future satellites descriptions. Over 4000 pages and 9000 keywords.
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