http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
a reproduction of a MS. of the thirteenth century, with a dissertation and historical index illustrating its development from the Gregorian antiphonale missarum
Gradual (Salisbury: Ms. British Library. Additional 12194)
Plainsong and Mediaeval Music Society (Great Britain)
cii pages facsims. (236 pages, 57 unnumbered pages) ; 28 cm.
Prepared for the members of the Plainsong and Mediaeval Music Society by Walter Howard Frere.
From the Howard Mayer Brown, Edward Downes and Mary Schieffelin Book Collections, October 2004.