E3. Standard. Seltmann, Werner and Angerhöfer, Günter. Fagott-Schule in sechs Bänder, vol. 6 (Mainz: Schott), p. 132. Permission granted for inclusion in this WWW index by Deutcher Verlag für Musik.
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E3. Jolivet, Michel. The Double Reed 10/3 (Winter 1987): 22.
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