C%C3%A9sar Isella
Csar Isella is an Argentinian singer and songwriter of folk music. He joined Los Fronterizos from 1956 to 1966, was one of the main figures of the Movement of the New Songbook, and in the 1990s he discovered and sponsored the singer Soledad Pastorutti. He has written the music for Cancin con todos , regarded as the Latin American anthem.
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Source: Wikipedia