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Subject (Region)
- 21st century1
- Adan1
- Addison's Flat (N.Z.)1
- Afghanistan2
- Africa50
- Africa, North9
- Africa, Southern4
- Africa, Sub-Saharan2
- Africa, West1
- Air forces1
- Aitutaki Atoll (Cook Islands)1
- Akaroa3
- Akaroa (N.Z.)2
- Alaska5
- Alaska Territory (1912-1959)1
- Alaska, Department and District of (1867-1912)4
- Albania3
- Alberta3
- Aleutian Islands (Alaska)1
- Alexandra (N.Z.)1