http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
twenty-four vocalises for soprano (m.-soprano or tenor) : the same transposed for alto, baritone or bass) : op. 81
Arr. for alto, baritone or bass and piano.
Schirmer's library of musical classics ; v. 80-81