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Subject
- Administrative and political divisions1,040
- Age15
- Age distribution (Demography)5
- Agriculture5
- Air bases2
- Airport control towers1
- Airports9
- Alluvial plains4
- Alluvial streams4
- Altitudes5
- Amusement parks1
- Architecture, Domestic1
- Atmospheric temperature4
- Autonomous soviet socialist republics1
- Basins1
- Basins (Geology)1
- Bays4
- Biology and Ecology15
- Biomass energy4
- Biotic communities2