Columbia subject headings:
Harvard subject headings:
Land settlement--Poland--Silesia (Voivodeship)--History.
Migration, Internal--Poland--Silesia (Voivodeship)--History.
Silesia (Poland : Voivodeship)--Economic conditions.
Princeton subject headings:
Land settlement--Silesia, Lower (Poland and Germany).
Land use, Rural--Silesia, Lower (Poland and Germany).
Silesia, Lower (Poland and Germany)--Economic conditions--History.