Columbia subject headings:
Austria--Foreign relations--Poland.
Austria--History--20th century.
Germany--Foreign relations--Poland.
Germany--History--20th century.
Poland--Foreign relations--20th century.
Poland--Foreign relations--Austria.
Poland--Foreign relations--Germany.
Poland--History--20th century.
Harvard subject headings:
Austria--Foreign relations--Poland.
Austria--History--20th century.
Germany--Foreign relations--Poland.
Germany--History--20th century.
Poland--Foreign relations--20th century.
Poland--Foreign relations--Austria.
Poland--Foreign relations--Germany
Poland--History--20th century
Princeton subject headings: