http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Klavierauszug revidiert von Gustav F. Kogel.
Libretto by R. de' Calsabigi, French translation by F.L.G. Lebland du Boullet. Cf. Loewenburg. Annals of opera.
From the Edward O. D. Downes Collection.