3rd Military Mapping Survey of Austria-Hungary - <a href="//commons.wikimedia.org/wiki/Breslau" class="mw-redirect" title="Breslau">Breslau</a>
Military mapping authority of Austria-Hungary
<a rel="nofollow" class="external free" href="http://lazarus.elte.hu/hun/moterkep.htm">http://lazarus.elte.hu/hun/moterkep.htm</a> - László ZENTAI