Columbia subject headings:
Economic history--1750-1918--Congresses.
Social sciences--History--19th century--Congresses.
Harvard subject headings:
Economic history--1750-1918--Congresses.
Social sciences--History--19th century--Congresses.
Princeton subject headings:
Economic history--1750-1918--Congresses.
Social sciences--History--19th century--Congresses.