Columbia subject headings:
United States--History--Archival resources--Foreign countries.
United States--History--Bibliography.
United States--History--Research--Foreign countries.
United States--History--Study and teaching (Higher)--Foreign countries.
Harvard subject headings:
United States--History--Archival resources--Foreign countries.
United States--History--Bibliography.
United States--History--Research--Foreign countries.
United States--History--Study and teaching (Higher)--Foreign countries.
Princeton subject headings:
United States--History--Archival resources--Foreign countries.
United States--History--Bibliography.
United States--History--Research--Foreign countries.
United States--History--Study and teaching (Higher)--Foreign countries.