If you're looking for the for the Himnario Celebremos Su Gloria , several digital archives offer the complete 291-page collection as a PDF. You can find the most common versions on these platforms:
¿Busca las partituras para un (piano, guitarra, voces)? Himnario Celebremos Su Gloria Pdf Partituras
The hymnal is still under active copyright. LifeWay Christian Resources holds the rights to the compilation, translations, and specific arrangements found in the red-covered edition most of us remember. While many of the songs are public domain (e.g., “Santa, Santa, Santa”), the specific engraving and harmonization in that book are not. If you're looking for the for the Himnario