Columbia subject headings:
Demography--Mexico.
Families--Mexico.
Social interaction in adolescence--Statistics.
Social interaction in children--Statistics.
Youth--Social conditions--21st century.
Harvard subject headings:
Children--Mexico--Social conditions.
Social interaction in adolescence--Mexico.
Youth--Mexico--Social conditions.
Princeton subject headings:
Children--Mexico--Social conditions.
Social interaction in adolescence--Mexico.
Youth--Mexico--Social conditions.