Región
North America
América del Norte
26
Mexico
10
United States
8
Europe
7
México
7
Estados Unidos
4
Latin America
4
European Union countries
3
América del Sur
2
Norteamérica
2
Países de la Unión Europea
2
South America
2
1789-1900
1
1815-1861
1
19th century
1
América Latina
1
Asia
1
Australasia
1
Civil War, 1861-1865
1
Developing countries
1
Economic conditions
1
England
1
Estados Unidos de América
1
Europa
1
Europe, Eastern
1
European Economic Community countries
1
Germany
1
M'xico
1
Niger River Delta
1
Nigeria
1
Unión Europea
1