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