original song written and composed by Sergio Ortega and Eduardo Carrasco

1969 film by Miguel Littín

1973 studio album by Quilapayún

song composed by Sergio Ortega with lyrics by Pablo Neruda (Spanish) and Valerio Negrini (Italian), performed by Inti-Illimani featuring Riccardo Fogli (counterpoint)

1977 film by René Féret

Beatles cover

1971 film

political song composed by Sergio Ortega, lyrics by Claudio Iturra