Columbia subject headings:
Leonardo, da Vinci, 1452-1519--Criticism and interpretation--Congresses.
Leonardo, da Vinci, 1452-1519--Knowledge and learning--Congresses.
Optics--Congresses.
Perspective--Congresses.
Harvard subject headings:
Leonardo, da Vinci, 1452-1519--Congresses.
Princeton subject headings:
Leonardo, da Vinci, 1452-1519--Criticism and interpretation--Congresses.
Leonardo, da Vinci, 1452-1519--Knowledge and learning--Congresses.
Optics--Congresses.
Perspective--Congresses.