Medical and Musical Byways of Mozartiana. This has had effects on other people too. The completed lesson plans are very useful. It is however one of the most difficult types of basic training that is considered non-combat. Beethoven Violin Sonatas s 5 (147;Spring148;) and 9 (147;Kreutzer148;) (1958) and 8 (1961). Johann Wolfgang von Goethe.