Bronze Mirror from Perugia with Pherse, Menerva, Turms and the head of Medusa.
Unknown author<span style="display: none;">Unknown author</span>
James Thomas Hooker: <i>Reading the Past: Ancient Writing from Cuneiform to the Alphabet.</i> University of California Press, Berkeley 1990, <a href="//commons.wikimedia.org/wiki/Special:BookSources/0520074319" title="Special:BookSources/0520074319">ISBN 0520074319</a>, p 349.