Izvornik: Purrfect 4-String Bass Method. Purrfect 4-String Bass Method by Brian Emmel. Brian Emmel. Double Bass sheet music. For Bass.
Prijevod: Purrfect 4-String Bass Metoda Brian Emmel. Kontrabas note. Za Bass. Bas. 56 stranice. Objavio Centerstream Publikacije. HL.201.