180 collected sight singing exercises.
For beginners we recommend the following introductory books:
I.J. Farkas: Practical Sight Singing, Introductory Level A
https://itunes.apple.com/book/id1031094794
I.J.Farkas: Practical Sight Singing, Introductory Level B
https://itunes.apple.com/book/id1067906284
To download the same version of the book with audio samples:
https://itunes.apple.com/book/id1074205597
