Waldo de los Ríos (real name: Osvaldo Nicolás Ferraro Gutiérrez) was a native of Buenos Aires who relocated to the USA in 1958 and then Spain in 1962. He is best-remembered for his ability to transform European classical music into pop music. De los Ríos committed suicide in 1977.
My collection: 7" single no. 6464
Found: Discogs.com, received 5 October 2021
Cost: €1
Tracks: 'En un mundo nuevo' / 'Pamperito'