| Geography & Travel | 5139 |
| Biography & Genealogy | 4072 |
| History of Europe | 2194 |
| English & Old English Literatures | 2052 |
| History of Asia | 1201 |
| Other Religions | 918 |
| French & Related Literatures | 837 |
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| Other Literatures | 598 |
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| Plants (Botany) | 498 |
| History of Europe | 469 |