Columbia subject headings:
Harvard subject headings:
Biblioteca ambrosiana--Art collections.
Crossbows--Design and construction--History--15th century.
Crossbows--Design and construction.
Crossbows--Pictorial works.
Engineering drawings--History--15th century.
Leonardo, da Vinci, 1452-1519
Leonardo, da Vinci, 1452-1519--Knowledge--Mechanical engineering.
Leonardo, da Vinci, 1452-1519--Notebooks, sketchbooks, etc.
Princeton subject headings:
Biblioteca ambrosiana--Art collections.
Codice atlantico.
Crossbows--Design and construction--History--15th century.
Engneering drawings--History--15th century.
Leonardo, da Vinci, 1452-1519--Knowledge--Mechanical engineering.
Leonardo, da Vinci, 1452-1519--Notebooks, sketchbooks, etc.