Columbia subject headings:
Barrios, Gerardo, 1813-1865.
El Salvador--Kings and rulers.
Heads of state--El Salvador.
Harvard subject headings:
Barrios, Gerardo, 1813-1865.
El Salvador--Kings and rulers.
Heads of state--El Salvador.
Princeton subject headings:
Barrios, Gerardo, 1813-1865.
El Salvador--History--1838-1944.
Presidents--El Salvador--Biography.