Columbia subject headings:
Harvard subject headings:
Youth--Latin America--Attitudes.
Youth--Latin America--Social conditions--21st century.
Youth--Portugal--Attitudes.
Youth--Portugal--Social conditions--21st century.
Youth--Spain--Attitudes.
Youth--Spain--Social conditions--21st century.
Princeton subject headings:
Youth--Latin America--Attitudes.
Youth--Latin America--Social conditions--21st century.
Youth--Portugal--Attitudes.
Youth--Portugal--Social conditions--21st century.
Youth--Spain--Attitudes.
Youth--Spain--Social conditions--21st century.