Hauptmann, M. Op. 2. 2 Duets. (1082).
— Op. 16. 3 Duos. (5611).
Hermann. Op. 26. Morceaux mélodiques. Bks. 4, 5. (5328 d, e).
Kayser, H. E. Violin Studies, carefully revised, fingered, and with instructive annotations by Ernst Heim:—
16 Studies (comprising studies in the half, 1st, 2nd, 3rd, 4th, 5th, 6th, and 7th Positions). Op. 28. (5619).
Nos. 1-9 belong to II; 10 and 11 to III.
16 Studies (to follow the 36 Studies, Op. 20). Op. 30. (5620).
Nos. 1-3, 7, 10, 14, 15 belong to II; Nos. 6 and 8 to III.
Mayseder. 3 celebrated Duets. Op. 30, 31, and 32. (10007 a-c).
Ries, H. Progressive Duets. (Ernst Heim).