Columbia subject headings:
Biel (Bern, Switzerland)--Economic conditions.
Social movements--Switzerland--Biel (Bern)--History.
Harvard subject headings:
Biel (Bern, Switzerland)--Economic conditions.
Social movements--Switzerland--Biel (Bern)--History.
Princeton subject headings:
Biel (Bern, Switzerland)--Economic conditions.
Social movements--Switzerland--Biel (Bern)--History.