<i>Title:</i> Listening device used to detect approach of Zeppelins; operated by Spanish? soldier April 1917, during World War I
<i>Abstract/medium:</i> 1 photographic print.
Mitchell, William, 1879-1936, photographer
1917
<p>Library of Congress
</p>
<ul><li><i>Catalog:</i> <a rel="nofollow" class="external free" href="https://lccn.loc.gov/2002721744">https://lccn.loc.gov/2002721744</a></li>
<li><i>Image download:</i> <a rel="nofollow" class="external free" href="https://cdn.loc.gov/master/pnp/cph/3a30000/3a33000/3a33100/3a33140u.tif">https://cdn.loc.gov/master/pnp/cph/3a30000/3a33000/3a33100/3a33140u.tif</a></li>
<li><i>Original url:</i> <a rel="nofollow" class="external free" href="https://www.loc.gov/pictures/item/2002721744/">https://www.loc.gov/pictures/item/2002721744/</a></li></ul>