Columbia subject headings:
Photographers--Italy--Trieste--History--19th century.
Photographers--Italy--Trieste--History--20th century.
Harvard subject headings:
Photographers--Italy--Trieste--Directories.
Photography--Italy--Trieste--History--19th century.
Photography--Italy--Trieste--History--20th century.
Princeton subject headings:
Photographers--Italy--Trieste--History--19th century.
Photographers--Italy--Trieste--History--20th century.