John Hladczuk / Sharon Schneider Hladczuk
Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
Histories of these songs, biographical information about the composers and lyricists, and background on each song’s entrance into status as ’official’ make this source the most comprehensive in existence. The entries include sheet music, allowing readers to reproduce for themselves the tunes that have proved so important in the history of the Union.