http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Catches, rounds, two-part and three-part songs
composed by Henry Purcell ; edited by W. Barclay Squire and J.A. Fuller-Maitland.
Also published under title: Duets, trios, and catches.