Columbia subject headings:
Harvard subject headings:
Environmental health--Italy--Trieste--History--19th century.
Medicine--Italy--Trieste--History--19th century.
Public health--Italy--Trieste--History--19th century.
Princeton subject headings:
Environmental health--Italy--Trieste--History--19th century.
Medicine--Italy--Trieste--History--19th century.
Public health--Italy--Trieste--History--19th century.