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- D - World History 18 results
- G - Geography, Anthropology, Recreation 8 results
- E - United States History 6 results
- J - Political Science 5 results
- H - Social Science 4 results
- P - Language and Literature 4 results
- F - General American History 2 results
- B - Philosophy, Psychology, Religion 1 results
- L - Education 1 results
- N - Fine Arts 1 results
- R - Medicine 1 results
- T - Technology 1 results