Columbia subject headings:
Agricultural laborers--France--Alsace.
Agriculture--France--Alsace.
Alsace (France)--Economic conditions.
Alsace (France)--Population.
Harvard subject headings:
Agricultural laborers--France--Alsace.
Agriculture--France--Alsace.
Alsace (France)--Economic conditions.
Alsace (France)--Population.
Princeton subject headings:
Agriculture--France--Alsace.
Alsace (France)--Economic conditions.