B4. Biggers, Cornelia Anderson. The Contra-Bassoon: A Guide to Performance (Bryn Mawr, Penn.: Elkan-Vogel, inc. 1977), p. 48.
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B4. Froese, Esther. The Double Reed 1/3 (December 1978): 33.
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B4. Glassburner, Robert R. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 81.
x x eb o | x x o F c Bb
B4. Seltmann, Werner and Angerhöfer, Günter. Fagott-Schule in sechs Bänder, vol. 6 (Mainz: Schott), p.137. Permission granted for inclusion in this WWW index by Deutcher Verlag für Musik.
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