<div class="description">
<p>7
</p>
<br>Subjects: Sound; Music; Music</div>
<div class="fn value">
<dl><dd>Helmholtz, Hermann von, 1821-1894</dd>
<dd>Guéroult, Georges</dd>
<dd>Wolff, Auguste Desiré Bernard, 1821-1887</dd></dl></div>
Internet Archive identifier