This is in three volumes, composed by Abbe Ferdinand Portier, to accompany the chants of the Graduale Romanum (1974). Published in 1984, this first volume contains accompaniments for the Solemn Masses and principal feasts of the Church Year.
The second has accompaniments for the seasons of Advent and Lent and the third contains the propers for the Sundays of Ordinary Time. These elegant accompaniments are a model of simplicity and are models for harmonizing and improvising on the various chants. A great resource for organists and scholars alike.
Hardcover.