http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
v. 1. Twenty daily exercises.--v. 2. Twenty operatic vocalises.
Each volume issued separately for high, med. or low voice.
Gift from the library of Frank and Elizabeth Coulter, December, 1999.
Schirmer's library of musical classics ; vol. 654-