Columbia subject headings:
Harvard subject headings:
Historiography--Silesia--Congresses.
History--Research--Silesia--Congresses.
Learned institutions and societies--Silesia--Congresses.
Silesia--Historiography--Congresses.
Silesia--History--Congresses.
Princeton subject headings:
Learned institutions and societies--Silesia--Congresses.
Silesia--Historiography--Congresses.
Silesia--History--Congresses.