Columbia subject headings:
Industries--Silesia, Lower (Poland and Germany)
Silesia, Lower (Poland and Germany)--Economic conditions.
Harvard subject headings:
Industries--Silesia, Lower (Poland and Germany)--History--20th century.
Knowledge management--Silesia, Lower (Poland and Germany)--History--20th century.
Manufacturing processes--Silesia, Lower (Poland and Germany)--History--20th century.
Reconstruction (1939-1951)--Silesia, Lower (Poland and Germany)
Silesia, Lower (Poland and Germany)--Economic conditions--20th century.
Silesia, Lower (Poland and Germany)--Politics and government--20th century.
Princeton subject headings:
Industries--Silesia, Lower (Poland and Germany)--History--20th century.
Knowledge management--Silesia, Lower (Poland and Germany)--History--20th century.
Manufacturing processes--Silesia, Lower (Poland and Germany)--History--20th century.
Reconstruction (1939-1951)--Silesia, Lower (Poland and Germany).
Silesia, Lower (Poland and Germany)--Economic conditions--20th century.
Silesia, Lower (Poland and Germany)--Politics and government--20th century.