Columbia subject headings:
Giotto, 1266?-1337--Sources.
Painting, Gothic--Expertising--Italy.
Painting, Italian--Expertising.
Harvard subject headings:
Giotto, 1266?-1337--Sources.
Painting, Gothic--Expertising--Italy.
Painting, Italian--Expertising
Princeton subject headings:
Giotto, 1266?-1337.