Columbia subject headings:
Harvard subject headings:
Ciphers.
Cryptography--Early works to 1800
Fireworks--Early works to 1800.
Military art and science--Early works to 1800
Military engineering--Early works to 1800.
Ordnance--Early works to 1800.
Princeton subject headings:
Ciphers--Early works to 1800.
Cryptography--Early works to 1800.
Fireworks--Early works to 1800.
Military art and science--Early works to 1800.
Military engineering--Early works to 1800.
Ordnance--Early works to 1800.