<bdi><a href="https://en.wikipedia.org/wiki/en:Albert_Bierstadt" class="extiw" title="w:en:Albert Bierstadt"><span title="American painter">Albert Bierstadt</span></a>
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1. <a href="https://en.wikipedia.org/wiki/Christie%27s" class="extiw" title="en:Christie's">Christie's</a>, LotFinder:  entry  <a rel="nofollow" class="external text" href="https://www.christies.com/LotFinder/lot_details.aspx?intObjectID=5154332">5154332</a> (sale 2058, lot 171, New York, 4 December 2008)<br>2. <a rel="nofollow" class="external text" href="https://www.bonhams.com/auctions/23480/lot/18/">Bonhams, New York, 22 November 2016, lot 18</a>