| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Science of Vocl Pedagogy Tape 2 | 978-0-253-35113-5 (0-253-35113-8) | 1967 |
| The Science of Vocal Pedagogy: Theory and Application | 978-0-253-20378-6 (0-253-20378-3) | 1986 |
Appelman D Ralph · D.A. · D. Appelman · (D-R) · D R Appelman · D. Ralph · R. A.