Columbia subject headings:
Harvard subject headings:
Bern (Switzerland)--History--20th century.
Nineteen sixty-eight, A.D.--Political aspects--Switzerland--Bern.
Nineteen sixty-eight, A.D.--Social aspects--Switzerland--Bern.
Princeton subject headings:
Bern (Switzerland)--History.
Nineteen sixty-eight, A.D.
Protest movements--Switzerland--Bern.
Switzerland--Social conditions--History.