http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Twenty-four vocalises for soprano or mezzo-soprano, op. 2
introduction to the 24 vocalises, op. 6 (for perfecting the mechanism of the voice)
24 vocalises for soprano or mezzo-soprano, op. 2
composed by Mathilde Castrone Marchesi ; edited and translated by J.H. Cornell.