Brechner, Claude H., 1887- [from old catalog] · Boston, New York [etc.] Allyn and Bacon · leaf 93
Figure 62. Photograph of Sound Wave Produced by Speakingthe Vowel a as in Father. … Figure 63. — Photograph of Sound Wave Produced by the SopranoSinging Alone in the Sextet from Lucia.
Physics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
