Columbia subject headings:
Fertility, Human--Massachusetts--History.
Fertility, Human--United States--History.
Massachusetts--Population--History.
United States--Population--History.
Harvard subject headings:
Fertility, Human--Massachusetts--History.
Fertility, Human--United States--History.
Massachusetts--Population--History.
United States--Population--History.
Princeton subject headings:
Fertility, Human--Massachusetts--History.
Fertility, Human--United States--History.
Massachusetts--Population--History.
United States--Population--History.