Illia, Arturo ärto͞o´rō ēl´yä [key], 1900–1983, president of Argentina (1963–66). A country physician, he entered politics after 1930, and from 1948 to 1952 he was one of the few non-Perónist representatives in the national legislature. He was elected president in 1963, but with only 25% of the vote; he was unable to deal effectively with the country's deteriorating economy and the political problems created by the followers of deposed Juan Perón. Illia canceled Argentina's petroleum contracts with foreign companies, a move that, while popular, soon destroyed the country's virtual self-sufficiency in oil. After the Perónists made gains in the 1966 elections, alarmed military leaders deposed Illia and replaced him with Gen. Juan Onganía.
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