Columbia subject headings:
Argentina--Politics and government--1860-1910.
Roca, Julio Argentino, 1843-1914.
Harvard subject headings:
Argentina--Politics and government--1860-1910.
Roca, Julio Argentino, 1843-1914
Princeton subject headings:
Argentina--Politics and government--1860-1910.
Roca, Julio Argentino, 1843-1914.