Columbia subject headings:
Democracy--Peru--Statistics.
Peru--Population--Statistics.
Peru--Social conditions--Statistics.
Public opinion--Peru--Statistics.
Harvard subject headings:
Democracy--Peru--Statistics.
Peru--Population--Statistics.
Peru--Social conditions--Statistics.
Public opinion--Peru--Statistics.
Princeton subject headings:
Democracy--Peru--Statistics.
Peru--Population--Statistics.
Peru--Social conditions--Statistics.
Public opinion--Peru--Statistics.
Statistics.