Columbia subject headings:
Hunger--Political aspects--Congresses.
Protest movements--History--Congresses.
Riots--History--Congresses.
Harvard subject headings:
Famines--Political aspects--Europe--History--Congresses.
Food supply--Government policy--Europe--History--Congresses.
Hunger--Political aspects--Congresses.
Protest movements--History--Congresses.
Riots--Europe--History--Congresses.
Riots--History--Congresses.
Princeton subject headings:
Famines--Political aspects--Europe--History--Congresses.
Food supply--Government policy--Europes--History--Congresses..
Riots--Europe--History--Congresses.