From the Bassoon-Family Fingering Companion by Terry B. Ewell - Swanson, Robert. "Pictorial Bassoon Fingerings." Woodwind Magazine 4/1 (September 1951): 9.
From the Bassoon-Family Fingering Companion by Terry B. Ewell - Swanson, Robert. "Pictorial Bassoon Fingerings." Woodwind Magazine 4/1 (September 1951): 9.