Columbia subject headings:
Harvard subject headings:
Leonardo, da Vinci, 1452-1519--Knowledge--Paleontology.
Leonardo, da Vinci, 1452-1519--Notebooks, sketchbooks, etc.
Paleontology--Italy--History.
Princeton subject headings:
Leonardo, da Vinci, 1452-1519--Knowledge--Paleontology.
Leonardo, da Vinci, 1452-1519--Notebooks, sketchbooks, etc.
Paleontology--Italy--History.