Sung as a serenade to co-star Amalia Rodrigues in Armando Miranda's movie Capas Negras, named after the black capes of the university student population of Coïmbra. Title means Coïmbra Is A Lesson In Love. Ribeiro first recorded it on the Copacabana label in '51. The melody was already written in '39, but repeatedly rejected in revista theaters.
Amália Rodrigues [live in Dublin; where Yvette Giraud asked for the sheet; Amalia's first recording was on her first album in '54]
Yvette Giraud [as Avril au Portugal; French lyrics: Jacques Larue]
Les Baxter [n°2 US as April In Portugal, inspiring the Portuguese government to adopt the song (and Amalia) for touristic propaganda reasons]
Eddy Christiani [as April In Portugal; Dutch version]
Julio Iglesias [as Abril en Portugal]
José Galhardo is also the original lyricist of Lisboa Antigua, which became a n°1 US in '55 for Nelson Riddle as Lisbon Antigua. There's a VA-album with 24 versions of Coïmbra and derivatives (cd Roots), including Ribeiro's.