From the Bassoon-Family Fingering Companion by Terry B. Ewell Swanson, Robert. "Pictorial Bassoon Fingerings." Woodwind Magazine 3/10 (June 1951): 5.
From the Bassoon-Family Fingering Companion by Terry B. Ewell Swanson, Robert. "Pictorial Bassoon Fingerings." Woodwind Magazine 3/10 (June 1951): 5.