Columbia subject headings:
Harvard subject headings:
Bricklayers--France--Lyon--History.
Construction workers--France--Lyon--History.
Migrant labor--France--Lyon--History.
Stonemasons--France--Lyon--History.
Princeton subject headings:
Bricklayers--France--Lyon--History.
Construction workers--France--Lyon--History.
Migrant labor--France--Lyon--History.
Stonemasons--France--Lyon--History.