Studie Nr. 5 (Short 1930)
Study No. 6 (Short 1930)
Study No. 7 (Short 1931)
Study No. 8 (Short 1931)
Study No. 9 (Short 1931)
Study No. 1 (Short 1929)
Studie Nr. 2 (Short 1930)
Studie Nr. 3 (Short 1930)