""Kaart van Nederlandisch-Indie naar oorspronkelijke teekening van H. Ph. Th. Witkamp", J.H. deBussy, Amsterdam, ca. 1893." - van <a rel="nofollow" class="external free" href="http://www.lib.utexas.edu/maps/historical/history_asia.html">http://www.lib.utexas.edu/maps/historical/history_asia.html</a>  - <a rel="nofollow" class="external free" href="http://www.lib.utexas.edu/maps/faq.html#3.html">http://www.lib.utexas.edu/maps/faq.html#3.html</a>
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