Weiße Flecken auf einer Afrikakarte von 1861.
<bdi><a href="https://www.wikidata.org/wiki/Q18412918" class="extiw" title="d:Q18412918">Johann Georg Heck</a>
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1861
<p><cite class="book" style="font-style:normal" id="Reference-Heck-1861">Heck, Johann Georg; K.Th. Wagner; C.G.D. Stein (1861)      <i> Neuer Atlas der ganzen Erde für die gebildeten Stände und für Schulen</i>, <a href="https://en.wikipedia.org/wiki/en:Leipzig" class="extiw" title="w:en:Leipzig"><span title="largest city in Saxony, Germany">Leipzig</span></a>:  Stein  <small><a href="https://en.wikipedia.org/wiki/Online_Computer_Library_Center" class="extiw" title="en:Online Computer Library Center">OCLC</a>:   <a rel="nofollow" class="external text" href="https://www.worldcat.org/oclc/78933021">78933021</a>. </small></cite>
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Electronic version created 2003 as part of the <a rel="nofollow" class="external text" href="http://palmm.fcla.edu/map/">Florida Map Collection project</a> (2003).