Original: Belwin 21st Century Band Method, Level 2. Jack Bullock. Trombone sheet music. Belwin 21st Century Band Method, Level 2. Trombone. Method.
Tradução: Belwin 21st Century Band Method, Nivel 2. redoblante, bombo y percusión auxiliar. Partitura Trombone. Trombón. Banda de Concierto.