Hughes: Late Medieval Liturgical Offices
A. Hughes: Late Medieval Liturgical Offices. Resources for electronic research [LMLO]
Texts, Subsidia Mediaevalia 23 (Toronto 1994)
Sources and Chants, Subsidia Mediaevalia 24 (Toronto 1996)
Each volume is accompanied by a set of floppy disks with an electronic database.
See also the PIMS-LMLO website and CANTUS/LMLO Analysis site.