Columbia subject headings:
Harvard subject headings:
Leonardo, da Vinci, 1452-1519--Knowledge--Mechanical Engineering.
Mechanical engineering--Early works to 1800
Princeton subject headings:
Art and technology--Exhibitions.
Art, Renaissance--Italy--Siena--Exhibitions.
Engineering drawings--Exhibitions.
Martini, Francesco di Giorgio, 1439-1502--Exhibitions.
Technology in art--Exhibitions.