1933 Gregorian Accompaniment Treatise (Potiron)
A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.
Pope Saint Paul VI (3 April 1969): “Although the text of the Roman Gradual—at least that which concerns the singing—has not been changed, the Entrance antiphons and Communions antiphons have been revised for Masses without singing.”

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.

A free PDF download of this entire book is provided, courtesy of the St. Jean de Lalande Library of Rare Books.
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