G#4. Biggers, Cornelia Anderson. The Contra-Bassoon: A Guide to Performance (Bryn Mawr, Penn.: Elkan-Vogel, inc. 1977), p. 48.
o x x | o x x c c# Bb o x x | x o o c c#
G#4. Ewell, Terry B. (05 October 1996). Source unknown. "For G# and higher, experiment with the fingerings. It seems that c is more important than c#, c fully half depressed."
o x x | x o o c c# Bb
G#4. Glassburner, Robert R. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 80.
x x x | x x x c c#
G#4. Seltmann, Werner and Angerhöfer, Günter. Fagott-Schule in sechs Bänder, vol. 6 (Mainz: Schott), p.135-136. Permission granted for inclusion in this WWW index by Deutcher Verlag für Musik.
o x x | o x o d c#
With L. H. thumb C# use the alternate D key:
o x x | o o x (d)c# o x x | o x x d c# o x x | o o(x) Ab d c# o x x | o x x Ab d c# o x x | x x x d c# o x x | o o o c# x x x | o o x d c#