Bb2. Cooper, L. Hugh. The Double Reed 2/4 (April 1980): 29. For pianissimo use Cooper p. 56.
(Db) F# x x x | x x o F (w) Bb E
Bb2. Corey, Gerald. To the World's Bassoonists 7/3 (1977): 5. For pianissimo.
F# x x x | x x o F w Bb E (C) D
Bb2. Swanson, Robert. "Pictorial Bassoon Fingerings." Woodwind Magazine 3/9 (May 1951): 5. Same as Cooper p. 53 with L. H. D key and without L. H. little finger Db key.
x x x | x o x Ab w D
Heckel-system bassoon fingerings by note name