Columbia subject headings:
Harvard subject headings:
Cartography--Italy--Imola--Exhibitions.
Leonardo, da Vinci, 1452-1519--Exhibitions.
Mechanical engineering--Early works to 1800--Exhibitions.
Princeton subject headings:
Leonardo, da Vinci, 1452-1519--Exhibitions.
Leonardo, da Vinci, 1452-1519--Knowledge of cartography--Exhibitions.
Leonardo, da Vinci, 1452-1519--Knowledge of mechanical engineering--Exhibitions.