Subject
Economic conditions
Land settlement patterns
History
7
Social conditions
3
Agriculture
2
Antiquities
2
Archaeology, Medieval
2
Chinese
2
Colonization
2
Economic development
2
Ethnic identity
2
Excavations (Archaeology)
2
Frontier and pioneer life
2
Historical geography
2
Human settlements
2
Race relations
2
Social life and customs
2
City planning
1
Land use, Rural
1
Population
1
Regional planning
1
Rural population
1
Urbanization
1