Columbia subject headings:
Harvard subject headings:
Constance, Lake, Region--History--20th century--Congresses.
Nineteen sixties--Congresses.
Protest movements--Constance, Lake, Region--Congresses.
Student movements--Constance, Lake, Region--Congresses.
Princeton subject headings:
Constance, Lake, Region--History--20th century--Congresses.
Constance, Lake--History.
Nineteen sixties--Congresses.
Protest movements--Constance, Lake--Congresses.
Student movements--Constance, Lake--Congresses.