Columbia subject headings:
Social problems--Congresses.
Social sciences--Canada--Congresses.
Social sciences--United States--Congresses.
Harvard subject headings:
Social problems--Congresses
Social sciences--Canada--Congresses.
Social sciences--United States--Congresses.
Princeton subject headings:
Social problems--Congresses.
Social sciences--Canada--Congresses.
Social sciences--United States--Congresses.