Columbia subject headings:
Harvard subject headings:
Pais, Sidónio, 1872-1918.
Portugal--History--Conspiracy of 1817.
Portugal--Politics and government--1910-1926.
World War, 1914-1918--Portugal
Princeton subject headings:
Pais, Sidónio, 1872-1918.
Portugal--History--Conspiracy of 1817.
Portugal--Politics and government--1910-1926.