Columbia subject headings:
Armor--Germany--History.
Germany--History, Military.
Military art and science--Technological innovations--Germany.
Military weapons--Germany--History.
Harvard subject headings:
Armor--Germany--History.
Germany--History, Military.
Military art and science--Technological innovations--Germany.
Military weapons--Germany--History.
Princeton subject headings:
Armor--Germany--History.
Germany--History, Military.
Military art and science--Technological innovations--Germany.
Military weapons--Germany--History.