Boosey and Hawkes Supplemental Vocal Instruction Books

Boosey and Hawkes Sound Thinking - Volume I (Music for Sight-Singing and Ear Training) Composed by Micheal Houlahan

Boosey and Hawkes Sound Thinking - Volume II (Developing Musical Literacy) Composed by Micheál Houlahan

Boosey and Hawkes 333 Reading Exercises Book Composed by Zoltán Kodály