Columbia subject headings:
Germany--Antiquities, Roman--Congresses.
Netherlands--Antiquities, Roman--Congresses.
Pottery, Roman--Germany--Congresses.
Pottery, Roman--Netherlands--Congresses.
Harvard subject headings:
Excavations (Archaeology)--Germany--Congresses.
Germany--Antiquities, Roman--Congresses.
Pottery industry--Germany--Congresses.
Pottery, Roman--Germany--Congresses.
Princeton subject headings: