Columbia subject headings:
France--Emigration and immigration.
Labor--France.
World War, 1914-1918--Economic aspects--France.
Harvard subject headings:
France--Emigration and immigration.
Labor--France
Working class--France
World War, 1914-1918--Economic aspects--France
Princeton subject headings:
France--Emigration and immigration.
Labor--France.
Working class--France.
World War, 1914-1918--Economic aspects--France.