Columbia subject headings:
Government, Resistance to--Portugal--History--20th century.
Portugal--Politics and government--1933-1974.
Portuguese periodicals--Foreign countries.
Underground literature--Portugal--Bibliography--Catalogs.
Underground literature--Portugal--History--20th century.
Harvard subject headings:
Government, Resistance to--Portugal--History--20th century.
Portugal--Politics and government--1933-1974.
Portuguese periodicals--Foreign countries.
Underground literature--Portugal--Bibliography--Catalogs.
Underground literature--Portugal--History--20th century.
Princeton subject headings: