Columbia subject headings:
Harvard subject headings:
Poland--History--Vladislaus II Jagiello, 1386-1434--Congresses.
Tannenberg, Battle of, Poland, 1410--Anniversaries, etc.--Congresses.
Tannenberg, Battle of, Poland, 1410--Congresses.
Teutonic Knights--History--Congresses.
Princeton subject headings:
Poland--History--Vladislaus II Jagiello, 1386-1434--Congresses.
Polish-Teutonic Knights' War, 1409-1411--Campaigns--Congresses.
Tannenberg, Battle of, Poland, 1410--Anniversaries, etc.--Congresses.
Tannenberg, Battle of, Poland, 1410--Congresses.
Teutonic Knights--History--Congresses.