Arturo Umberto Illia Francesconi ( ; August 4 , 1900 -- January 18 , 1983 ) was President of Argentina from October 12 , 1963 , to June 28 , 1966 , and a member of the centrist UCR .
Arturo Umberto Illia Francesconi ( ] ; August 4 , 1900 -- January 18 , 1983 ) was an Argentine politician . He was President of Argentina from October 12 , 1963 , to June 28 , 1966 .