Map of ancient Surrentum. From Karl Julius Beloch: <i>Campanien</i>. Breslau, 1890.
<a href="//commons.wikimedia.org/w/index.php?title=Karl_Julius_Beloch&amp;action=edit&amp;redlink=1" class="new" title="Karl Julius Beloch (page does not exist)">Karl Julius Beloch</a> (1854–1929)
1890
<a rel="nofollow" class="external text" href="https://archive.org/details/campaniengeschic00belo">Internet Archive</a>