Cornelis van der Zaal
Unknown author<span style="display: none;">Unknown author</span>
<a rel="nofollow" class="external text" href="https://www.delpher.nl/nl/kranten/view?coll=ddd&amp;redirect=true&amp;identifier=MMKB12:000169021:mpeg21:a00096">De Volkskrant, 27 mei 1937</a>