<i>Title:</i> 6th Division mathematics class on a street paving problem
<i>Abstract/medium:</i> 1 photographic print : cyanotype.
Johnston, Frances Benjamin, 1864-1952, photographer
1899
<p>Library of Congress
</p>
<ul><li><i>Catalog:</i> <a rel="nofollow" class="external free" href="https://lccn.loc.gov/2001703600">https://lccn.loc.gov/2001703600</a></li>
<li><i>Image download:</i> <a rel="nofollow" class="external free" href="https://cdn.loc.gov/master/pnp/cph/3a10000/3a16000/3a16900/3a16942u.tif">https://cdn.loc.gov/master/pnp/cph/3a10000/3a16000/3a16900/3a16942u.tif</a></li>
<li><i>Original url:</i> <a rel="nofollow" class="external free" href="https://www.loc.gov/pictures/item/2001703600/">https://www.loc.gov/pictures/item/2001703600/</a></li></ul>