Columbia subject headings:
Harvard subject headings:
Germany--Foreign relations--20th century--Congresses.
Germany--Foreign relations--Sweden--Congresses.
Sweden--Foreign relations--20th century--Congresses.
Sweden--Foreign relations--Germany--Congresses.
Princeton subject headings:
Germany--Foreign relations--20th century--Congresses.
Germany--Foreign relations--Sweden--Congresses.
Sweden--Foreign relations--20th century--Congresses.
Sweden--Foreign relations--Germany--Congresses.