Columbia subject headings:
Historiography--Poland--Warsaw--History--20th century.
Towarzystwo Miłośników Historii w Warszawie--History.
Harvard subject headings:
Historiography--Poland--Warsaw--History--20th century.
Towarzystwo Miłośników Historii w Warszawie--History.
Princeton subject headings:
Historiography--Poland--Warsaw--History--20th century.