Columbia subject headings:
Harvard subject headings:
Birth control--Nigeria--Statistics.
Contraception--Nigeria--Statistics.
Demographic surveys--Nigeria.
Fertility, Human--Nigeria--Statistics.
Health surveys--Nigeria.
Mortality--Nigeria--Statistics.
Nigeria--Population--Statistics.
Public health--Nigeria--Statistics.
Princeton subject headings:
Demographic surveys--Nigeria.
Nigeria--Population--Statistics.
Nigeria--Statistics, Vital.