Columbia subject headings:
Harvard subject headings:
Germany--Armed Forces--Weapons systems--History--20th century.
Military research--Germany--History--20th century.
World War, 1939-1945--Equipment and supplies.
World War, 1939-1945--Germany.
Princeton subject headings:
Germany--Armed Forces--Weapons systems--History--20th century.
Military research--Germany--History--20th century.
World War, 1939-1945--Germany--Equipment and supplies.
World War, 1939-1945--Germany.