1924 “Liber Usualis” in Modern Notation (Solesmes)
A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.
“Is it not true that prohibiting or suspecting the extraordinary form can only be inspired by the demon who desires our suffocation and spiritual death?” —The Vatican’s chief liturgist from 2014-2021; interview with Edw. Pentin (23-Sep-2019)