Columbia subject headings:
Duroni, Alessandro, 1807-1870.
Opticians--Italy--Milan--Biography.
Photographers--Italy--Milan--Biography.
Photography--Italy--Milan--History--19th century.
Harvard subject headings:
Duroni, Alessandro, 1807-1870
Opticians--Italy--Milan--Biography.
Photographers--Italy--Milan--Biography.
Photography--Italy--Milan--History--19th century.
Princeton subject headings:
Duroni, Alessandro, 1807-1870.
Opticians--Italy--Milan--Biography.
Photographers--Italy--Milan--Biography.
Photography--Italy--Milan--History--19th century.