Ten Christmas Songs for two Tubas with Piano accompaniment: tuba duets

Arrangements of the following ten Christmas songs for two Tubas with Piano accompaniment (full scores and parts are provided):

Angels We Have Heard on High
Away in a Manger
God Rest You, Merry Gentlemen
Hark, The Herald Angels Sing
In The Bleak Midwinter
It Came Upon The Midnight Clear
O Come All Ye Faithful
O Little Town of Bethlehem
Silent Night
We Three Kings

Three scores and sets of parts are provided - one version is in bass clef, concert pitch, another is for Bb tubas in treble clef, and the third is for Eb tubas in treble clef.