Columbia subject headings:
Harvard subject headings:
Child rearing--United States--History--20th century.
Infants--United States--History--20th century.
Maternal and infant welfare--United States--History--20th century.
Parent and infant--United States--History--20th century.
Princeton subject headings:
Child rearing--United States--History--20th century.
Infants--United States--History--20th century.
Maternal and infant welfare--United States--History--20th century.
Parent and infant--United States--History--20th century.