The encyclopedia is devoted to the history of Argentina. The first chapters, however, talk about the origin of the human race, the early migrations that populated America, the Pre-Columbian populations in modern Argentina, and the voyages of Christopher Columbus to América.
History of Argentina itself begins to be narrated from the discovery of the Río de la Plata by Juan Díaz de Solís, and follows to the sanction of the Sáenz Peña Law and the first presidential mandate of Hipólito Yrigoyen.
Abad de Santillán, Diego (1965). Historia Argentina [Argentinian History] (in Spanish). Buenos Aires: TEA (Tipográfica Editora Argentina).