Columbia subject headings:
Harvard subject headings:
European cooperation.
France--Foreign relations--Germany.
France--Foreign relations--Poland.
Germany--Foreign relations--France.
Germany--Foreign relations--Poland.
Poland--Foreign relations--France.
Poland--Foreign relations--Germany
Weimar Triangle.
Princeton subject headings:
European cooperation.
France--Foreign relations--Germany.
France--Foreign relations--Poland.
Germany--Foreign relations--France.
Germany--Foreign relations--Poland.
Poland--Foreign relations--France.
Poland--Foreign relations--Germany.
Weimar Triangle.