Columbia subject headings:
Painting, Renaissance.
Painting--Autoradiography.
Painting--Expertising.
Underdrawing.
Harvard subject headings:
Painting, Renaissance--Expertising--Exhibitions.
Painting, Renaissance--Technique--Exhibitions.
Painting--Radiography--Exhibitions.
Underdrawing--Exhibitions.
Princeton subject headings:
Painting, Renaissance.
Painting--Autoradiography.
Painting--Expertising.
Underdrawing.