Columbia subject headings:
Harvard subject headings:
Bridges--Italy--Pisa.
Embankments.
Levees--Italy--Pisa.
Municipal engineering--Italy--Pisa.
Pisa (Italy)--Description and travel.
Princeton subject headings:
Bridges--Italy--Pisa.
Pisa (Italy)--Buildings, structures, etc.
Pisa (Italy)--Description and travel.
Streets--Italy--Pisa.