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Note: click on the number in front of a link to display the full description for the link. You can click on a subject heading to go to the list of full descriptions for that subject.
reference/atlas| 40 | Compton's Online Encyclopedia | |
| 41 | Encyclopedia Proteus | |
| 42 | Encyclopedia Britannica Online | |
| 43 | Encyclopedia Mythica | |
| 44 | Columbia Encyclopedia | |
| 45 | Wikipedia |