http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
"An unabridged and unaltered republication of the work first published ... in 1929."
Includes musical incipits for some of the songs.
From the Howard Mayer Brown, Edward Downes and Mary Schieffelin book collections, October 2004.