cover of <i>Hoe maken we de paddenstoelen klaar</i>, 1919; by Cath. Cool
Cath. Cool; photo by <a href="//commons.wikimedia.org/wiki/User:Dick_Bos" title="User:Dick Bos">User:Dick Bos</a>
Library <a href="https://en.wikipedia.org/wiki/nl:Heimans_en_Thijsse_Stichting" class="extiw" title="w:nl:Heimans en Thijsse Stichting">Heimans &amp; Thijsse Stichting</a>, Amsterdam