Rhythmical Etudes for Bassoon by professor at the Prague Conservatoire and later Prague's Academy of Music Karel Pivonka (1907 1986) is a key work for anyone studying the Bassoon. Apart from rhythmical and purely technical issues the etudes also encourage the student to try out a colourful range of different expressions.
Karel Pivonka: Rhythmische Etueden fuer Fagott: Bassoon: Instrumental Work
Rhythmische Etüden Für Fagott