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Materia
- American Studies 38
- Earth and Environmental Sciences 38
- American Government 16
- Politics and Policy 16
- American Literature 11
- English Literature: General Interest 6
- Life Sciences 6
- American History: General Interest 4
- Archaeology of The Americas 4
- American History after 1945 3
- Asian Studies 3
- History 3
- Physics And Astronomy 3
- Politics and International Relations 3
- American History 1861-1900 2
- Early Republic and Antebellum History 2
- Economics 2
- Engineering 2
- General Science 2
- Law 2