| Titel | ISBN-13 (ISBN-10) | Erscheinungsjahr |
|---|---|---|
| Professional Training of Singers and Teachers of Singing: A Comparative Study of Selected Vocal Performance and Pedagogy Programs in the United States ... Education / Série 11: Pédagogie, Band 968) | 978-3-631-57O87-6 (3-631-57O87-2) | 2007 |