Columbia subject headings:
Harvard subject headings:
Childbirth--England--History--18th century.
Midwives--England--History--18th century.
Obstetricians--England--History--18th century.
Obstetrics--England--History--18th century.
Princeton subject headings:
Childbirth--England--History--18th century.
Midwives--England--History--18th century.
Obstetricians--England--History--18th century.
Obstetrics--England--History--18th century.