Columbia subject headings:
Excavations (Archaeology)--Poland--Kalisz--Congresses.
Kalisz (Poland)--Antiquities--Congresses.
Kalisz (Poland)--Charters, grants, privileges--Congresses.
Kalisz (Poland)--History--Congresses.
Harvard subject headings:
Kalisz (Poland)--History--Congresses.
Princeton subject headings: