Columbia subject headings:
Domestic relations--Germany (West)--Congresses.
Domestic relations--Sweden--Congresses.
Unmarried couples--Germany (West)--Congresses.
Unmarried couples--Sweden--Congresses.
Harvard subject headings:
Domestic relations--Germany (West)--Congresses.
Domestic relations--Sweden--Congresses.
Marriage law--Germany (West)--Congresses.
Marriage law--Sweden--Congresses.
Unmarried couples--Legal status, laws, etc.--Germany (West)--Congresses.
Unmarried couples--Legal status, laws, etc.--Sweden--Congresses.
Princeton subject headings: