1. Symposium on adequacy of training of voice specialists
2. Johnson, Dorothy Campion. 1950. “Voice and Diction Training in American Universities and Colleges,”. Stanford University. unpub. thesis
3. Fritz, Charles A. 1928. “The Content of the‐Teaching of Speech in the American College‐before 1850 with Special Reference to Its Influence on Current Theories,”. New‐York University. unpub. diss.