Columbia subject headings:
Harvard subject headings:
Beck, Jadwiga, 1896-1974.
Beck, Józef, 1894-1944.
Poland--History--1918-1945
Poland--History--1945-1980
Princeton subject headings:
Beck, Jadwiga, 1896-1974.
Beck, Józef, 1894-1944.
Poland--History--1918-1945.
Poland--History--1945-1980.