Columbia subject headings:
Drawing, Renaissance--Italy.
Leonardo, da Vinci, 1452-1519--Criticism and interpretation.
Harvard subject headings:
Drawing, Italian--15th century.
Drawing, Italian--16th century.
Drawing, Renaissance--Italy.
Leonardo, da Vinci, 1452-1519
Princeton subject headings:
Drawing, Renaissance--Italy.
Leonardo, da Vinci, 1452-1519--Criticism and interpretation.