By Charles E. Callahan, Jr. For Organ, Piano, or Keyboard. Communion. Level: Easy to Moderately Easy. Collection. Published by MorningStar Music Publishers.

(A Collection of Duets for Piano and Organ). By Charles E. Callahan, Jr. (1951-). For Piano and Organ Duet. General. Sacred, Hymn. Moderately Easy. Collection. 19 pages

By Charles E. Callahan, Jr. For Organ/Piano duet. Chamber Music. Level: Medium. Published by MorningStar Music Publishers.