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<a href="https://de.wikipedia.org/wiki/Ludwig_Gustav_Voltz" class="extiw" title="de:Ludwig Gustav Voltz"><b>Ludwig Gustav Voltz</b> (1825 – 1911)</a></div>
1. <a rel="nofollow" class="external text" href="http://www.artnet.com/artists/ludwig-gustav-voltz/am-seeufer-_adLeYEVs3-wCz79jyz66w2">artnet.com</a><br>2. <a rel="nofollow" class="external text" href="http://www.arcadja.com/auctions/de/private/voltz_ludwig_gustav/kunstwerken/29984/0/?rvn=3">Palais Dorotheum, Wien, 05. Juni 2012, Los 41 via ARCADJA auction results</a>