Drawing of apertural view of a shell of <i>Pupilla muscorum</i>
<bdi><a href="https://www.wikidata.org/wiki/Q11925747" class="extiw" title="d:Q11925747"><span title="Czech ecologist, geologist, science writer and zoologist">Vojen Ložek</span></a>
</bdi>
CC BY 3.0
Ložek V. (1965) "Das Problem der Lößbildung und die Lößmollusken". <i>E&amp;G – Quaternary Science Journal</i> <b>16</b>(1): 61-75.<a href="//doi.org/10.3285/eg.16.1.05" class="extiw" title="doi:10.3285/eg.16.1.05">doi:10.3285/eg.16.1.05</a> <a rel="nofollow" class="external free" href="http://quaternary-science.publiss.net/articles/246">http://quaternary-science.publiss.net/articles/246</a> page 65. Cropped from the image 1.