Many editions of
this work exist. The Edition 1, which
includes all the choral parts, is based on the full score editions
#6397, #6398, #6399, #6400, #6401 available at CPDL and published by the Center for Computer
Assisted Research in the Humanities (CCARH) at Stanford University.
The Edition 2, which also includes all the choral parts, is derived
from Edition 1, but checked against "The New Novello Choral Edition"
(Nov 07 0137). The individual movements "Hallelujah" and "For unto us a
child is born"
available separately are based on the CPDL editions #4983 (by Kelvin Smith)
and #173 (by Christopher Moore), respectively.