From the Bassoon-Family Fingering Companion by Terry B. Ewell -Cooper, L. Hugh. The Double Reed 2/3 (December 1979): 16. Pence, Homer. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 77. Schoenbach, Sol. In Klimko, Ronald. Bassoon Performance Practices and Teaching in the United States and Canada. Idaho: University of Idaho, 1974, p. 68. Tilson, Lawrence. In Apfelstadt, Marc and Klimko, Ronald. Bassoon Performance Practice, Teaching Materials, Techniques and Methods. Idaho: University of Idaho, 1993, p. 56. Cooper p. 16.