Columbia subject headings:
Law--Peru.
Peru--Politics and government--1919-1968.
Peru--Politics and government--1968-1980.
Peru--Social conditions.
Harvard subject headings:
Peru--History.
Peru--Politics and government--20th century.
Princeton subject headings:
Law--Peru.
Peru--Politics and government--1919-1968.
Peru--Politics and government--1968-.
Peru--Social conditions.