Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--Italy--Volterra Region--History.
Sharecropping--Italy--Volterra Region--History.
Volterra Region (Italy)--Population, Rural--History.
Volterra Region (Italy)--Rural conditions.
Princeton subject headings:
Agriculture--Economic aspects--Italy--Volterra Region--History.
Rural population--Italy--Volterra Region--History.
Sharecropping--Italy--Volterra Region--History.
Volterra Region (Italy)--Rural conditions.