Columbia subject headings:
Birth control--Developing countries.
Birth control--United States.
Developing countries--Population.
United States--Population.
Harvard subject headings:
Birth control--Developing countries.
Birth control--United States.
Developing countries--Population.
United States--Population.
Princeton subject headings:
Birth control--Developing countries.
Birth control--United States.
Developing countries--Population.
United States--Population.