Columbia subject headings:
Harvard subject headings:
Argentina--Foreign relations--Paraguay.
Argentina--History--1817-1860.
López, Francisco Solano, 1827-1870.
Paraguay--Foreign relations--Argentina.
Princeton subject headings:
Argentina--Foreign relations--Paraguay.
Argentina--History--1817-1860.
López, Francisco Solano, 1827-1870.
Paraguay--Foreign relations--Argentina.