Debussy, Claude. Iberia. de Gomar, Juan. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 55. Recommends fingerings for B4 and C4 found in Cooper pp. 305 and 320.
B4: C4: Eb Eb x x o | x x o F x o o | x x o F c c
Suggested Heckel bassoon fingerings for musical passages