<div class="fn value">
<a href="https://en.wikipedia.org/wiki/Max_Planck" class="extiw" title="w:Max Planck">w:Max Planck</a></div>
<a rel="nofollow" class="external free" href="https://archive.org/details/bub_gb_RycKAAAAIAAJ">https://archive.org/details/bub_gb_RycKAAAAIAAJ</a>