Belwin 2nd and 4th Position String Builder
By Samuel Applebaum. For Violin. String Orchestra Method/Supplement. Belwin Course for Strings. Book. 32 pages. Published by Alfred Publishing.

The Second and Fourth Position String Builder is to be used after the Third and Fifth Position String Builder. However, it is also to be used as a continuation of Book III of any of the standard string class methods. Published for violin, viola, cello, bass, piano accompaniment, and teacher's manual.