Notis
Oriģināls
Marchesi, Mathilde. Theoretical and Practical Vocal Method, Op 31. Op 31. Marchesi, Mathilde. Voice. Main sheet music.
Tulkojums
Marchesi, Matilde. Theoretical and Practical Vocal Method, Op 31. Op 31. Marchesi, Matilde. Balss. Galvenais notis.