Columbia subject headings:
Harvard subject headings:
Architecture, Roman--Germany--Trier--Guidebooks.
Trier (Germany)--Antiquities--Guidebooks.
Trier (Germany)--Buildings, structures, etc.--Guidebooks.
Princeton subject headings:
Architecture, Roman--Germany--Trier--Guidebooks.
Guidebooks.
Trier (Germany)--Antiquities--Guidebooks.
Trier (Germany)--Buildings, structures, etc.--Guidebooks.