Columbia subject headings:
Drawing--Italy--Exhibitions.
Leonardo, da Vinci, 1452-1519--Influence--Exhibitions.
Machinery in art--Exhibitions.
Technology in art--Exhibitions.
Harvard subject headings:
Drawing--Italy--Exhibitions.
Leonardo, da Vinci, 1452-1519--Influence--Exhibitions.
Machinery in art--Exhibitions.
Technology in art--Exhibitions.
Princeton subject headings:
Leonardo, da Vinci, 1452-1519--Influence--Exhibitions.
Machinery in art--Exhibitions.
Technology in art--Exhibitions.