F4. Allard, Maurice. Le Basson: Methode de basson (Paris: Gèrard Billaudot, 1975), p. 12. Allard's prefered fingering.
C# x o o | x x x Ab
F4. Allard, Maurice. Le Basson: Methode de basson (Paris: Gèrard Billaudot, 1975), p. 24. For fast passages.
x o o | x x x Ab
F4. Corey, Gerald. "How to Make the French Bassoon `Work.'" The Journal of the International Double Reed Society 1 (May 1973): 39.
x o o | x x x Ab
Eb
C#
x o o | x x x Ab
"For difficult combinations":
C# o x o | x x x Ab
F4. James, Cecil. Unpublished chart.
x o o | x x x Ab
F4. Wadine, Edward. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 65.
Same for both French and German bassoons:
o x o | x x o Ab