Columbia subject headings:
Art and science.
Leonardo, da Vinci, 1452-1519.
Harvard subject headings:
Art and science
Bella principessa.
Leonardo, da Vinci, 1452-1519--Criticism and interpretation.
Leonardo, da Vinci, 1452-1519--Spurious and doubtful works.
Princeton subject headings:
Bella principessa.
Drawing--Attribution.
Leonardo, da Vinci, 1452-1519--Authorship.
Profile portraits--Attribution.
Women--Portraits.