Columbia subject headings:
Leonardo, da Vinci, 1452-1519--Authorship.
Painting, Italian--Expertising.
Painting--Conservation and restoration.
Salai, Andrea, approximately 1480-1524--Authorship.
Harvard subject headings:
Leonardo, da Vinci, 1452-1519
Leonardo, da Vinci, 1452-1519--Authorship.
Painting, Italian--Expertising
Painting--Radiography
Salai, Andrea, approximately 1480-1524--Authorship.
Princeton subject headings:
Leonardo, da Vinci, 1452-1519--Authorship.
Painting, Italian--Expertising.
Painting--Conservation and restoration.
Salai, Andrea, approximately 1480-1524--Authorship.