Russell, O. (1931). Speech and voice: With x-rays of English, French, German, Italian, Spanish, soprano, tenor, and baritone subjects. New York: Macmillan. [FULLTEXT]
Russell, O. (1931). Speech and voice: With x-rays of English, French, German, Italian, Spanish, soprano, tenor, and baritone subjects. New York: Macmillan. [FULLTEXT]