Columbia subject headings:
England--Population--Statistics.
England--Social conditions--1066-1485.
England--Statistics, Vital.
Epidemics--England--History.
Medicine--England--History.
Harvard subject headings:
England--Population--Statistics.
England--Social conditions--1066-1485.
England--Statistics, Vital.
Epidemics--England--History.
Medicine--England--History.
Princeton subject headings:
England--Population--Statistics.
England--Social conditions--1066-1485.
England--Statistics, Vital.
Epidemics--England--History.
Medicine--England--History.