Para Rubber, 23-year old tree.
<div class="fn value">
Kleingrothe, C.J. (Kleingrothe, Carl Josef, 1864-1925) / Medan</div>
<a rel="nofollow" class="external text" href="http://hdl.handle.net/1887.1/item:855127">Leiden University Library, KITLV, image 1404045</a> <a rel="nofollow" class="external text" href="https://digitalcollections.universiteitleiden.nl/imagecollection-kitlv">Collection page Southeast Asian &amp; Caribbean Images (KITLV)</a>