Columbia subject headings:
Families--Peru.
Families.
Marriage--Peru.
Marriage.
Peru--Social conditions.
Unmarried couples--Peru.
Unmarried couples.
Harvard subject headings:
Families--Peru.
Families.
Marriage--Peru.
Marriage.
Peru--Social conditions.
Unmarried couples--Peru.
Princeton subject headings:
Peru--Social conditions--1968-
Unmarried couples--Legal status, laws, etc.--Peru.