Columbia subject headings:
Diplomatic and consular service--United States--Directories.
International agencies--United States--Directories.
Non-governmental organizations--United States--Directories.
United States--Foreign relations administration--Directories.
Harvard subject headings:
Diplomatic and consular service--United States--Directories.
International agencies--United States--Directories.
Non-governmental organizations--United States--Directories.
United States--Foreign relations administration--Directories.
Princeton subject headings:
International agencies--United States--Directories.