1936 Graduale (Dr. Franz Xavier Mathias)
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.”