Columbia subject headings:
Defense industries--Employees.
Labor unions--Great Britain.
World War, 1914-1918--Economic aspects--Great Britain.
Harvard subject headings:
Defense industries--Employees
Labor unions--Great Britain
World War, 1914-1918--Economic aspects--Great Britain
Princeton subject headings:
Defense industries--Employees.
Labor unions--Great Britain.
Weapons industry--Employees.
World War, 1914-1918--Economic aspects--Great Britain.