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Subject
- 17371
- Abarca, Silvestre, 1707-17841
- Academia de Matemáticas de Barcelona1
- Aeronautics1
- Aeronautics, Military2
- Air defenses1
- Air pilots, Military1
- American Revolution (1775-1783)1
- Antitank missiles1
- Antitank weapons1
- Appointments and retirements1
- Architects4
- Architecture2
- Armed Forces5
- Armed forces1
- Artillery3
- Artillery operations2
- Artillery, Field and mountain3
- Assassination2
- Astronautics2