Columbia subject headings:
Diplomats--Travel--United States--Registers.
Statesmen--Travel--United States--Registers.
United States--Relations--Chronology.
Visits of state--United States--Registers.
Harvard subject headings:
Cabinet officers--Travel--United States.
Chronologies
Registers (Lists)
United States--Foreign relations--Miscellanea.
Visits of state
Princeton subject headings:
Diplomats--United States--Travel--Registers.
Statesmen--United States--Travel--Registers.
United States--Relations--Foreign countries--Chronology.
Visits of state--United States--Registers.