Non-psalm verses for introits and communions.
'Examines biblical texts other than psalm verses used in 6 chant Mss.: Paris, B.N., lat.776; lat.780; lat.903; Oxford, Bodleilan Libr., Canon liturg. 366; Ivrea, Bibl. Capitolare 60; Roma, Bibl. Angelica, 123' (IMB).