1913 Gastoué Treatise on Gregorian Chant
A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.
“A much greater source of anxiety to Us is the style of action of those who maintain that liturgical worship should shed its sacred character, who foolishly say we should substitute for sacred items & furnishings ordinary common things in daily use.” —Pope Saint Paul VI (14 Oct 1968)