https://www.musicarts.com/g-schirmer-school-of-violin-technics-op-1--book-1-viola-method-composed-by-henry-schradieck-edited-by-samuel-lifschey-main0156681
G. Schirmer School of Violin Technics, Op. 1 - Book 1 Viola Method Composed by Henry Schradieck...