- Libro electrónicoConversational Solfege Level 1 Student Reading BookJohn Feierabend
- Libro electrónicoFirst Steps in Music for Preschool and Beyond (Revised Edition)John Feierabend
- Libro electrónicoConversational Solfege Level 2 Student Reading BookJohn Feierabend
- Libro electrónicoConversational Solfege Level 3 Student Reading BookJohn Feierabend
- Libro electrónicoConversational Solfege Level 1 Teacher's ManualJohn Feierabend