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| Free online encyclopedia that allows users to submit their own articles for inclusion in its database |
| A free encyclopedia built collaboratively using Wiki software |
| Motorcycling information, repair manuals, technical data, and useful statistics organized by manufacturer |
| Originally commissioned and peer reviewed articles across the life sciences |
| This site contains identification of marks of American Silver Manufacturers including Gorham, Tiffany, Towle, Duhme, Wallace, Lunt, and Watson |
| Natural Remedies for over 500 diseases, such as cancer, heart disease, sexually transmitted diseases, childhood diseases, with a special section on preventive health |
| Thousands of categorized entries of trivia - an invaluable resource for answer seekers |
| Reference source with several hypertext linked entries covering a broad variety of subjects |
| Portal/concise encyclopedia offers fun activities for learning and exercising the mind |
