Encyclopedias, Almanacs, Transcripts, and Maps
- Argentine Republic
- Arinze, Francis
- Aristocracy and Gentry
- Arithmetic and Numeracy
- Ark of the Covenant
- Armand Jean du Plessis de Richelieu
- Armand, Inessa
- Armed Neutrality
- Armed Services Lobbying Associations
- Armenia and Armenians
- Armenian Apostolic Church
- Armenian Genocide
- Armies
- Armies
- Armies: Recruitment, Organization, and Social Composition
- Arms Control and Disarmament Act (1961) and Amendments
- Arms Control and Disarmament: Non Nuclear
- Arms Control and Disarmament: Nuclear
- Arms Limitation and Management
- Arms Regulation and Disarmament