Columbia subject headings:
Leonardo, da Vinci, 1452-1519.
Mechanical engineering--Italy--History--16th century.
Mechanical engineering--Italy--History--To 1500.
Mechanics--Italy--History--16th century.
Mechanics--Italy--History--To 1500.
Harvard subject headings:
Leonardo, da Vinci, 1452-1519--Knowledge--Mechanical engineering.
Mechanical engineering--Italy--History--16th century.
Mechanical engineering--Italy--History--To 1500.
Mechanics--Italy--History--16th century.
Mechanics--Italy--History--To 1500.
Princeton subject headings:
Leonardo, da Vinci, 1452-1519.
Mechanical engineering--Italy--History--16th century.
Mechanical engineering--Italy--History--To 1500.
Mechanics--Italy--History--16th century.
Mechanics--Italy--History--To 1500.