https://www.australianmusiccentre.com.au/product/three-motets-introits-satb-unaccompanied
Score: Three Motets/Introits : SATB unaccompanied / Brett M McKern [2005] : Product : Australian...
Score: Three Motets/Introits : SATB unaccompanied / Brett M McKern [2005] 1 score (10p. -- A4 (portrait))
three motetsscoreintroitssatbunaccompanied
https://gregobase.selapa.net/chant.php?id=13840
GregoBase - Gloria (Introits tone 1)
gloriaintroitstone