Columbia subject headings:
Harvard subject headings:
Gerlafingen (Switzerland)--History--20th century.
Gerlafingen (Switzerland)--Social conditions--20th century.
Steel industry and trade--Switzerland--Gerlafingen--History.
Von Roll AG.
Princeton subject headings:
Gerlafingen (Switzerland)--History--20th century.
Gerlafingen (Switzerland)--Social conditions--20th century.
Steel industry and trade--Switzerland--Gerlafingen--History.
Von Roll AG.