Originale: Flute Methods, Studies and Ensembles. Version 2.0. Various. Flute sheet music. Flute Methods, Studies and Ensembles. Version 2.0. For Flute.
Traduzione: Flute Metodi, Studi e gruppi. Quattro Piccole Duets. Quattro Duets. Quaranta Progressive Duets, op. 55, parte 1.