Columbia subject headings:
Harvard subject headings:
Archiwum Akt Nowych w Warszawie--Catalogs.
Poland--Relations--Bibliography--Catalogs.
Poland. Ambasada. Great Britain--Archives--Catalogs.
Princeton subject headings:
Archiwum Akt Nowych w Warszawie.
Poland--History--1918-1945--Sources.
Poland. Ambasada (Great Britain)--History--Sources.