Columbia subject headings:
Lazio (Italy)--Antiquities.
Lazio (Italy)--Tours.
Via Nomentana (Italy)--Tours.
Via Salaria (Italy)--Tours.
Wall of Aurelian (Rome, Italy)--Tours.
Harvard subject headings:
Lazio (Italy)--Antiquities.
Lazio (Italy)--Tours.
Roads, Roman--Italy--Lazio.
Roads--Italy--Lazio.
Via Nomentana (Italy)--Tours.
Via Salaria (Italy)--Tours.
Wall of Aurelian (Rome, Italy)
Wall of Aurelian (Rome, Italy)--Tours.
Princeton subject headings: