Оригинал: Vocal Aerobics. strengthening and “aerobicizing” the muscles of the tongue, lips, mouth, and breath support. Julie Lyonn Lieberman.
Превод: Vocal Аеробика. Julie Lyonn Либерман. Voice нотни листове. Vocal Аеробика. Essentials за днешния Певци. За Vocal, Voice. HL.320723.