Columbia subject headings:
Harvard subject headings:
Czartoryski, Olgierd, książę, 1888-1977--Sources.
Germany--Foreign relations--Poland--Sources.
Poland--Foreign relations--Germany--Sources.
Poland--History--Revolution of 1848--Sources.
Polish question--Sources.
Princeton subject headings:
Czartoryski, Olgierd, książę, 1888-1977--Sources.
Germany--Foreign relations--Poland--Sources.
Poland--Foreign relations--Germany--Sources.
Poland--History--Revolution of 1848--Sources.
Polish question--Sources.