Columbia subject headings:
Infant health services--United States.
Infants--Mortality--United States.
Maternal health services--United States.
Perinatal death--United States.
United States--Statistics, Vital.
Harvard subject headings:
Infant health services--United States.
Infants--Mortality--Statistics.
Infants--Mortality--United States
Maternal health services--United States.
Perinatal death--United States.
United States--Statistics, Vital.
Princeton subject headings:
Infants--Mortality--Statistics.
United States--Statistics, Vital.