Keifer, R. A. (1983). To hear and proclaim: Introduction lectionary for Mass, with commentary for musicians and priests. National Association of Pastoral Musicians.

Keifer, Ralph A. To Hear and Proclaim: Introduction Lectionary for Mass, with Commentary for Musicians and Priests. Washington, D.C.: National Association of Pastoral Musicians, 1983.

Keifer, Ralph A. To Hear and Proclaim: Introduction Lectionary for Mass, with Commentary for Musicians and Priests. National Association of Pastoral Musicians, 1983.