Elma Doflein & Erich Doflein 
The Doflein Method [PDF ebook] 
The Violinist’s Progress. Development of technique within the first position

Chapter 1: F major – Chapter 2: The minor mode of baroque and classical music – Chapter 3: B flat major and G minor – Chapter 4: More rapid movement – Chapter 5: Pieces in slow time – Chapter 6: New types of bowing – Chapter 7: F sharp minor and C sharp minor – Chapter 8: Practice in old polyphonic music – Chapter 9: Short strokes with raised bow (spiccato) – Chapter 10: Frequent changing in the position of the semitone stop – Chapter 11: Playing on two strings – Chapter 12: Successive notes on non-adjacent strings – Chapter 13: Eleven Duets