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Head of state - Wikipedia
List of current heads of state and government - Wikipedia
Head of state | Role, Powers & Responsibilities | Britannica
President of the United States - Wikipedia
List of current heads of state and government - Simple English ...
Antony Blinken | Secretary of State, Biography, & Facts
List of current state leaders by date of assumption of office - Wikipedia
Head of state - Oxford Reference
Head of state - Simple English Wikipedia, the free encyclopedia
Records of heads of state - Wikipedia