Columbia subject headings:
Harvard subject headings:
Armor--Switzerland--History--Congresses.
Defense industries--Switzerland--History--Congresses.
Switzerland--Defenses--History--20th century--Congresses.
Switzerland--Military policy--20th century--Congresses.
Switzerland. Armée--Procurement--Congresses.
Switzerland. Armée--Weapons systems--Congresses.
Weapons--Switzerland--History--20th century--Congresses.
Princeton subject headings:
Switzerland--Defenses--History--20th century--Congresses.
Weapons--Switzerland--History--20th century--Congresses.