Columbia subject headings:
Eugenics--Great Britain--History--20th century.
Family size--Great Britain--History--20th century.
Harvard subject headings:
Eugenics--Great Britain--History--20th century.
Family size--Great Britain--History--20th century.
Princeton subject headings:
Eugenics--Great Britain--History--20th century.
Family size--Great Britain--History--20th century.