<div class="fn value">
Unknown author<span style="display: none;">Unknown author</span></div>
first half of 19<sup>th</sup> century <div style="display: none;">date QS:P571,+1850-00-00T00:00:00Z/7</div>
Historical Exhibition of the Hungarian National Museum Guide • 3 18th and 19th centuries, <a href="//commons.wikimedia.org/wiki/Special:BookSources/963-208-743-7" title="Special:BookSources/963-208-743-7">ISBN 963-208-743-7</a>, p. 46. (<a rel="nofollow" class="external text" href="http://muzeum.arcanum.hu/kiadvanyok">Magyar Digitális Múzeumi Könyvtár</a>)