Columbia subject headings:
Germany--History--Ludwig IV, 1314-1347--Sources--Bibliography--Catalogs.
Ludwig IV, Holy Roman Emperor, 1282?-1347--Bibliography--Catalogs.
Harvard subject headings:
Germany--History--Ludwig IV, 1314-1347--Sources--Bibliography--Catalogs.
Ludwig IV, Holy Roman Emperor, 1282?-1347--Bibliography--Catalogs.
Princeton subject headings:
Germany--History--Ludwig IV, 1314-1347--Sources--Bibliography--Catalogs.
Ludwig IV, Holy Roman Emperor, 1282?-1347--Archives--Catalogs.