Subject
Geography
189
World history
179
Asia
64
Europe History
47
Africa History
31
Latin Americans
28
Africa South of the Sahara
22
Central America
20
Middle East History
20
South America
20
Civilization, Ancient
19
America
18
North America
13
Asia, Eastern History
12
History, Ancient
11
South Asia History
11
Civilization, Medieval
10
Middle Ages
10
Southeast Asia History
10
Human geography
8
Russia (Federation) History
8
Africa, North
7
Australasia
7
Cultural geography
7
Oceania History
7
Physical geography
7
Population geography
7
Reformation
7
Renaissance
7
China Civilization
6
Korea
6
Language and culture
6
Tibet Region
6
Earth sciences
4
Landforms
4
Latin America History
4
Natural resources
4
Water use
4
Enlightenment
2
Asia, Central
1
Europe Civilization
1
Military history
1
Political geography
1