Columbia subject headings:
Birth control--Directories.
Developing countries--Population policy--Periodicals.
Population policy--Periodicals.
Population research--Directories.
Harvard subject headings:
Birth control--Directories.
Population research--Directories.
Princeton subject headings:
Birth control--Directories.
Developing countries--Population policy--Periodicals.
Periodicals.
Population policy--Periodicals.
Population research--Directories.