Columbia subject headings:
Astronomy--Congresses.
Astronomy.
Leopardi, Giacomo, 1798-1837--Knowledge and learning--Congresses.
Harvard subject headings:
Astronomy in literature--Congresses.
Astronomy--Italy--History--Congresses.
Leopardi, Giacomo, 1798-1837--Knowledge--Astronomy--Congresses.
Literature and science--Italy--History--Congresses.
Princeton subject headings:
Astronomy in literature--Congresses.
Astronomy--Italy--History--Congresses.
Leopardi, Giacomo, 1798-1837--Knowledge--Astronomy--Congresses.
Literature and science--Italy--History--Congresses.