| United States, History--Study and teaching |
87 |
| United States |
4 |
| United States, Canada |
2 |
| Slavery, West Indies--British West Indies, Slaves--Emancipation, Antislavery movements |
1 |
| Travel, United States, Economic history |
1 |
| United States, Great Britain, Diplomatic relations |
1 |
| United States, Missouri, Politics and government, Reconstruction (U.S. history, 1865-1877), Bates, Edward, 1793-1869 |
1 |
| World politics, International cooperation, Rural conditions, War, History, World history |
1 |