<bdi><a href="https://www.wikidata.org/wiki/Q45284159" class="extiw" title="d:Q45284159"><span title="French painter and engraver (1831-1888)">Nicolas Berthon</span></a>
</bdi>
1. <a rel="nofollow" class="external text" href="http://www.lot-tissimo.com/de/i/6540907/p/42/">Gene Shapiro Auctions, New York City, 16.11.2013, lot 74 via Lot-tissimo</a><br>2. <a rel="nofollow" class="external text" href="http://www.liveauctioneers.com/item/21542108_nicholas-berton-french-1831-1888-return-from">liveauctioneers.com</a>